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Aug 01, 2023

Best Sports Bras for Running of 2023

This comprehensive guide to the best running sports bras was created by a

This comprehensive guide to the best running sports bras was created by a six-person test team and over hundreds of hours of testing.

iRunFar's Alex Potter testing the Falke Madison Low Support Sport-Bra on a snowy spring day in Arizona. Photo: iRunFar/Meghan Hicks

When it comes to finding the best sports bra for running, it can seem like an impossible task with seemingly endless options. Anyone who has gone bra shopping can attest to the fact that finding a bra for everyday wear is frustrating on its own, but finding the right sports bra for running can take that experience to a whole other level.

Our bodies are incredibly diverse, and finding the best sports bras for running is difficult. There is no one-size-fits-all bra for our various shapes, sizes, and activities. We may have come a long way from the original Jogbra, but sports bra design is far from perfect. An ill-fitting sports bra can lead to a miserable day on the run: sore back, chafed sides, sweaty ribs, and immense frustration trying to get it off. Sometimes different bras will be needed for different seasons, weather, and activities.

We created this guide so that we could do some of the legwork for you. We researched some 120 bras, tested half of them on various body types, and came up with this list of the best sports bras for running available today. It was hard to narrow down to this list simply because we are so different in our shape and preferences!

For more background information on sports bras for running, see our buying advice, testing methodology, and frequently asked questions below the picks.

A well-fitting sports bra keeps everyone happy. Photo: iRunFar/Kristin Zosel

It's rare to find a bra that has a style and sizing that will work from an A cup all the way to DD, but the Athleta Ultimate Bra has done it!

The compression-style racerback design has a back cutout, reducing excess fabric for great breathability and range of motion, and it looks stylish as well. The sizing is split between an A to C cup design (in sizes XXS to XL) and a D to DD+ version (XXS to 3XL). Both versions maintain the same racerback style and multiple color options.

The bra's recycled nylon fabric is quick-drying and breathable. We found it to have very good support for running throughout the entire size range. The band may be a little tight, but it was still fairly easy to get on and off. The bra has removable pads, which can trap moisture — not ideal in any conditions. Luckily, removing them did not seem to compromise the bra's fit or support and helped with moisture control. The medium-impact support is great for running, and our testers found this to have more support than many similarly styled bras.

Bra Style: Compression

Materials: Recycled Nylon/Lycra

Support: Medium

Pros:

Cons:

While flashy styles and the latest and greatest bells and whistles are all well and good, sometimes simplicity rules. If a supportive, no-fuss style is what you are seeking, look no further than the Oiselle Hi Twenty Bra. This compression-style pullover design with thin racerback straps is easy to get on and off and provides a secure fit with no excess seams or material to weigh you down. A mesh back insert kept us cool and dry, and removable cup pads gave a little extra support.

Our testers found this to provide good support for smaller cup sizes, and adequate support for B to C cups. The chest band was noted to run small, so runners may need to size up to avoid rib compression for a better fit. It performed well in a variety of temperature conditions, and there were no issues with pressure points or chafing while wearing a pack. A crucial quality of a good piece of running clothing is that you forget you are wearing it — and this bra hit the mark there!

Bra Style: Compression

Materials: Polyester/Nylon/Spandex

Support: Medium

Pros:

Cons:

The under-the-radar Falke Madison Low Support Sport-Bra is a classic compression-style pullover racerback bra that is just the right combination of soft materials, stretch, support, and coverage in an attractive yet simple design.

Our testers found that it provided more than enough support for small cup sizes in running and higher-impact activities, even though it's only listed as offering low-impact support for small to medium breasts. The seamless stretchy material is easy to get on and off, and the removable pads add extra support. For those who like a little pop of color, there are many options!

This bra is cut a little higher in the front and armpit area, which creates the potential for chafing points on some body types. The racerback is a bit thicker than some other styles, so the excess fabric could run a little hotter than the more minimalist or mesh-paneled designs.

Bra Style: Compression

Materials: Polyester/Spandex

Support: Low to medium

Pros:

Cons:

When it comes to dressing for cold-weather runs, many of us go straight to wool garments. The Smartwool's Merino Sport Seamless Racerback Bra combines the natural moisture-wicking and odor-controlling properties of merino wool with the stretch and compression of nylon to create a bra perfect for chilly conditions. The inner merino fabric absorbs and wicks moisture away from your skin and dries quickly, helping keep you cool in warm temperatures and avoid the chill in cold weather.

The simple, stretchy racerback design is a breeze to get on and off and provides good compression support for smaller breasts, with removable pads for additional support and coverage. To help avoid pressure points, abrasions, or chafing, this bra is made with a seamless design — great for long days on the trails, especially with a pack.

While this bra earned high marks for its comfort and soft fabric, it was noted that the fabric did stretch out a bit after wearing and needed a wash to return to its compressive baseline. Our larger-breasted runners also found that this bra did not provide enough support for comfortable running. The removable pads can shift around a little, particularly with washing, and some may just opt to remove them and avoid that minor annoyance.

Bra Style: Compression

Materials: Merino Wool/Nylon/Elastane

Support: Medium

Pros:

Cons:

Made of lightweight stretchy material with a performance mesh cross-back strap design, the Patagonia Switchback Sports Bra stood out as a bra that provided plenty of comfort and support in a quick-drying, keep-you-cool package. Our testers found that the minimal material on the back kept them as dry as possible on hot and humid runs.

We love the stylish and functional open-back design and found it to be easy to get on and off, even after a muggy trail session. Patagonia is well-known for its fair trade and environmentally conscious approach, and this bra certainly reflects that.

The polyester fabrics used are 85-100% recycled, and they are sewn in a Fairtrade-certified factory. Add in Patagonia's longstanding participation in 1% for the Planet, where it pledges 1% of annual sales to the preservation and restoration of the natural environment, and you can feel pretty good about hitting the trails in this bra.

This bra provides good high-impact support for smaller cup sizes, but it isn't great for larger breasts. We found that there were some possible durability issues with long-term use, with some stretching, seam loosening, and fading of the elastic chest strap.

Bra Style: Compression

Materials: Recycled Polyester/Nylon/Spandex

Support: High for A to B cups, medium for B to C, and low for C to D

Pros:

Cons:

For those who like the look and feel of a standalone crop top or just want a bra with more coverage, the Janji Long Bra is for you! The wide straps and racerback design provide support and comfort in a flattering package. With Janji's bright patterned colors, this bra is sure to add a little extra pizazz to your running outfit.

This compression-style crop combines smooth material, mesh lining, and removable pads to create a breathable, supportive, and comfortable fit. The addition of a phone pocket in the newest version of this bra is a convenient feature as well. Our testers found the bra to be very supportive in the smaller sizes, with removable inserts that add a little extra support for those of us who need it. Janji's commitment to sustainability and supporting clean water access means you can feel good about your purchase and look stylish — win-win!

The longer crop style, wider straps, and extra material did mean that this bra was a little more difficult to get on and off than the strappy, open-back designs of others we tested. Those with shoulder issues or who are very averse to the occasional undergarment wrestling match may want to try this one on before you commit.

Bra Style: Compression

Materials: Nylon/Spandex/Polyester

Support: Medium

Pros:

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While, in theory, running is a simple sport that shouldn't cost a lot, adding up the price of an entire running outfit can start to make the entire endeavor less simple. For those looking to save money on their running clothes without sacrificing functionality, the Decathlon Kalenji Essential Running Bra is a great option at an affordable price.

This compression bra is also truly simple. It's a pullover bra with thin but highly compressive material, and its only bell or whistle is a chest panel with slightly larger holes for increased moisture-wicking and breathability.

Decathlon's site notes that this bra does run small, but we actually found it to run pretty true to size if you’re buying it for running.

We can't get over this price point: $14 for a bra that’ll hold things in place for running is quite the feat.

Bra Style: Compression

Materials: Polyamide/Spandex/Polyester

Support: Medium

Pros:

Cons:

One of the most common complaints about women's clothing is that there are no pockets! Or, at least, very few that are actually functional. It seems as though clothing companies are finally listening up, and pockets that can actually hold things are finally becoming a regular occurrence. Several sports bra manufacturers have gotten in on the fun, and our favorite of the bunch is the Oiselle Flyout Bra.

This is a pullover compression-style bra with wide shoulder straps designed to provide comfort under a pack. The back has full coverage with lightweight materials and an exterior mesh pocket that keeps your phone secure and bounce-free. It is billed as medium support for up to D cups.

The more extensive back fabric coverage and pullover design did mean this bra was a little harder to get on and off, but fear not — the bra comes in a zip-front style for those with shoulder or arm mobility issues — or those who just don't want to perform acrobatic feats to change out of their sports bra after a long run.

Bra Style: Compression

Materials: Polyester/Spandex

Support: Medium

Pros:

Cons:

The Tracksmith Run Bra combines old-school style with new-school fabrics to create a sleek, classic racerback compression bra that will go the distance. The racing stripe on the chest strap has a very retro feel, while the nylon blend material is soft and supportive. The material is quick-drying and performs very well in humid or wet conditions.

This bra is listed as having medium support for AA to C cups and low support for C and up. Our testers found it comfortable and supportive for smaller breasts and easy to get on and off, with just the right amount of stretch and compression. The material is thinner than some others, and there is no extra padding, which means there is potential for some nipple outline to show up — something to keep in mind if you find that bothersome.

Bra Style: Compression

Materials: Nylon/Elastane

Support: Low to medium

Pros:

Cons:

For a long time, one of the biggest hurdles for runners with larger breasts to overcome in order to run comfortably has been finding a sports bra that actually fits. After years of sub-par offerings, research and development on the part of running and sports bra companies has yielded some great products that eliminate bounce and provide support without totally sacrificing style — or your ability to breathe. At the top of our list for bras for larger breasts is the Runderwear Power Running Bra. As stated on the brand's website, the bras are designed "for runners by runners," so they have really taken to heart what works for large-breasted runners.

This is an encapsulated bra that features molded cups to reduce breast movement. The bra lives up to its name, with two hook-and-loop style closures on the back to provide additional support through the band without struggling to get it on and off. Wide, padded, adjustable shoulder straps further improve the fit and level of support.

The bra has a wide size range, with cup sizes from C to J and bands from 28 to 42, improving the odds of finding the right fit for your build. This high-impact bra will keep you secure and comfortable for all of your athletic activities.

This bra, as with most of the encapsulated styles, creates a more busty look as compared with traditional compression-only styles that tend to flatten and spread the chest more. Some runners who prefer to minimize their breasts might not like this style for that reason. Finding the right fit can require some trial and error — luckily, Runderwear offers free exchanges to help you find the perfect fit without compromise.

To learn more about this sports bra, check out our Runderwear Power Running Bra review.

Bra Style: Encapsulation

Materials: Polyamide/Elastane

Support: High

Pros:

Cons:

The Brooks Dare Racerback Run Bra 2.0 combines a standard racerback compression-style setup with adjustable straps, a molded encapsulated cup, and a hook-and-loop chest strap to create a supportive bra with more of a classic sports bra look that works well for larger breasts. The fabric is soft and handles moisture-wicking well.

The sizes range from 32B to 44FF and are returnable and exchangeable if your first pick doesn't quite fit the way you’d like. This bra is rated for high impact and provides a snug, secure fit for everything from cross-training to bombing down a technical descent.

Bra Style: Compression and encapsulation

Materials: Nylon/Elastane

Support: High

Pros:

Cons:

The Under Armour UA Infinity High Sports Bra is a high-impact bra that combines a molded encapsulation-like one-piece padding with a compression-style cross-back design to provide excellent support for larger breasts. The hook-and-eye chest strap closure and adjustable straps allow for some customization of the fit, and their HeatGear fabric with mesh panels wicks sweat and dries quickly for comfort in all temperatures.

Bra Style: Compression and encapsulation

Materials: Polyester/Elastane

Support: High

Pros:

Cons:

Adjustability is key when dialing in a supportive fit, and this is where the Shefit Flex Sports Bra shines.

The Shefit line uses their patented "Zip. Cinch. Lift." system to customize the support to each wearer's needs. The combination compression and encapsulation design utilizes a zip front and Velcro adjustment points on the straps — which can be worn as cross-back or more traditional H configuration — to lift and compress exactly where you need it, eliminating bounce without restricting breathing or range of motion. Seamless cups and four-way stretch fabric keep you secure and allow the bra to move with you. Though the bra is billed as medium support, our testers found it had more than enough support for running.

The bra's sizing ranges from extra small to 6 Luxe, accommodating cup sizes from A to I. To ensure you get the best fit possible, Shefit offers virtual fitting consultations and text, email, or phone support to help customers find the proper size and fit. While bras catering to larger breasts as a whole tend to be a bit more cumbersome to get on and off, this bra is not difficult to get on or clasp. The bra is also on the more stylish end of the spectrum among bras made for large breasts, which often sacrifice looks for function.

Bra Style: Compression and encapsulation

Materials: Nylon/Spandex

Support: Medium

Pros:

Cons:

Before we get into the nitty-gritty of how to choose a sports bra, let's talk about why we need a sports bra.

While we all know from personal experience that running with unsupported breasts doesn't feel very good, it wasn't until recent years that scientific research focused on how significant breast movement can affect athletic performance. At the forefront of much of this research has been the Research Group in Breast Health at the University of Portsmouth in the U.K., headed by Dr. Joanna Wakefield-Scurr.

The group has published myriad studies on the biomechanics of breast movement, breast support, and its effects on athletes. They have worked with a number of high-profile companies on sports bra development and testing, most recently Adidas's newly revamped sports bra collection — which is how we were introduced to Dr. Wakefield-Scurr and her research program.

Dr. Wakefield-Scurr's research has shown that breast movement has a significant impact on comfort as well as running economy and pace. For instance, if you run a marathon and your chest is unsupported, your breasts can end up running an extra four miles! During activity, the breasts move in a figure-eight-like pattern, not just up and down, but side to side and in and out.

Depending on the size and density of the breasts, the bust can move as much as 19 centimeters (about 7.5 inches) in any direction during a run if left unsupported (1, 2) — not exactly conducive to a great performance. In addition to breast discomfort, multiple studies by Dr. Wakefield-Scurr and her research group have shown that runners with unsupported breasts had a shorter stride length, slower leg turnover, and slower overall pace as compared to their performance with high support (3, 4, 5).

iRunFar's Marissa Harris wears the Runderwear Power Running Bra, which we named the best for large breasts. An encapsulation-style bra like this one can provide better support for larger breasts. Photo: iRunFar/Michael Harris

Now, other than being extremely uncomfortable and a distraction from what we want to be doing — running! — a poorly supported chest is also not good for the tissues themselves. The muscles in our chest wall, the pectoral muscles, sit underneath the breast tissue and provide very little support to the breast tissue. The breasts themselves have no muscle and are made up of the overlying skin, fat tissue, and mammary glands — none of which provide support to keep them in place.

Cooper's ligaments function as a sort of fibrous webbing that attaches to the pectoral muscles and supports the breast tissue and mammary glands. However, this support is really limited to static situations, like when our breasts remain up on our chest wall when we are just sitting around. They don't provide any meaningful support during activity. They also stretch over time, and their support diminishes, a phenomenon many of us are quite aware of!

Thus, a high-quality, supportive sports bra is imperative to support delicate tissues, keep us comfortable, and improve our running performance mile after mile. While different body types and breast sizes require different styles of sports bras, many members of our testing team chose Athleta's Ultimate Bra as the best sports bra for running.

Female breast anatomy. Image: Shutterstock

A good sports bra can make or break your run. Finding the right bra for your body is a balance between support, comfort, sizing, and style. We hope this information can help you choose the best sports bra for running for your specific body type.

Type of Support

Support can come in the form of compression or encapsulation. Compression bras are usually a simpler squish style and work best for runners with C-cup or smaller chests. Our testers found that the Athleta's Ultimate Bra provided great compression support for a wide array of breast sizes with their two different sizing options.

Encapsulation bras, like the Runderwear Power Running Bra, work similarly to a standard bra in that there are individual cups for each of the breasts to lock down movement.

There are downsides to each: compression-only bras may not work for bigger-breasted folks, and encapsulation bras may not work well for everyone, depending on the size and shape of the bust.

Encapsulation bras also tend to emphasize the chest visually — not quite circa 1990 Madonna-esque, but you get the idea. This may or may not be an appealing look, depending on your preferences.

In addition to the overall structure of the bra itself, support can also come in the form of adjustment features such as chest strap clasps and shoulder straps that can be tightened. This allows the wearer to lift and cinch the chest in rather than just relying on the support of the front and cups themselves.

Depending on the size and morphology of each wearer's chest, breasts have different ranges of movement. While smaller breasts may move just a bit up and down, bigger busts move in multiple directions, putting extra strain on the back. As a result of this, most larger-breasted people find encapsulation bras much more comfortable.

Running in only a sports bra can keep a runner cool during intense efforts. Photo: iRunFar/Meghan Hicks

Level of Support

The level of support is arguably the most important element when choosing a sports bra, and for those of us with larger busts, this will be the biggest deciding factor. A bra with poor support can lead to sore breasts, sore back, and the annoying bouncing feeling we all know and hate.

Replacing your sports bras regularly is another important factor in maintaining adequate support. Don't wait until they wear out and are fraying at the seams!

Many bras are categorized by brands as low, medium, or high support (or impact), but that is highly subjective and will vary depending on your bust size. Low-support bras are typically supportive enough for daily use, yoga, Pilates, or any activity with minimal bouncing. They generally have thinner straps, less-constrictive elastic, and are compression-based rather than encapsulation-based.

Medium support bras are billed as good for boxing, weightlifting, cycling, or hiking, though they are often supportive enough for running for smaller busted people.

High-support bras are the best for running, plyometrics, and any activity with a lot of bounce. They often have the thickest straps and the most padding, and they occasionally have underwires and other elements like clasps or adjustable shoulder straps that can lift and cinch to give the highest level of support.

The Shefit Flex Sports Bra is a medium support bra with thick straps and a good amount of padding. Our testers named it the most unique design for large chests. Photo: iRunFar/Michael Harris

Now, just because a bra is billed as low support doesn't necessarily mean that is true, particularly for those of us with smaller breasts. One bra we tested in particular, the Falke Madison Low Support Sport-Bra, was one of the most supportive for one of our testers, despite its low support description.

On the flip side, some medium-support bras came up short in the support department for even our smaller-breasted testers. The moral of the story is it all comes down to what is most comfortable for you.

Comfort

Going hand in hand with the level of support, it doesn't matter how locked down the breasts are if the bra itself is uncomfortable. Discomfort can come in many forms: chafing from rough seams, straps cutting into the shoulders or back due to a style that doesn't work, poor sizing that is too big or too small, lack of support, material that isn't quite soft enough, material that does not wick moisture appropriately, and any number of other things. Our testers loved the soft and supportive material of the Tracksmith Run Bra and found the bra to be incredibly comfortable.

What is the most comfortable bra for each person will vary wildly, and the best way to find this out is to try it on directly. Luckily, many companies have realized this and have very flexible return and exchange policies — convenient for those who can't access the bra of your choice in a nearby store. You can try on and return the Runderwear Power Running Bra as many times as needed until you can find the right fit for your body.

Sizing

If you thought buying the right size of jeans was a chore — why can't women's jeans have standard waist and length sizes like men's jeans?! — then you are in for a real treat in correctly sizing your sports bra. Finding the right bra size can take a masterclass in measuring, and sizes can vary so widely between and even within brands it's hard to standardize.

Some bras are in a standard size of XS to XL. Others go with the standard bra measurements of 30AA to 40DDD+, while still others go with numbered sizing, like dresses and pants from 2 to 14. Some brands change the sizing between bra styles even within their own company — I’m looking at you, Lululemon, Oiselle, and Brooks.

Again, the best way to figure out what works best for you comes down to trying on the bra, as sometimes the sizing does not line up with what is most comfortable for each user. While you might measure as a medium, if you prefer greater breast compression, you might want to size down. Yet, if you are highly sensitive to rib cage entrapment, sizing up might be appropriate. Choosing a bra with adjustable straps, like the Under Armour UA Infinity High Sports Bra, can help you dial in the fit more precisely.

Kelly Wolf races the 2019 Kendall Mountain Run in a long sports bra. Photo: iRunFar/Meghan Hicks

Style

There are a few different elements that go into this style category. First of all, the style of the bra itself, which partially goes hand in hand with the level of support — compression or encapsulation. Also, do you want a standard sports bra or a longer crop-top style one like the Janji Long Bra?

Secondly, will you choose a bra that slips overhead or one that clasps in the back like a regular bra? Do you need or want one that has adjustable straps to cinch things up a bit? Those are the functional elements of style.

The other element is not just style but s-t-y-l-e. Look good, feel good, right? I’ve — Alex Potter here — tried a number of sports bras that were comfortable and supportive, but being a shirtless runner as often as possible, how the bra looks on my body type is just as important as all the other elements.

I like bras that are flattering to my shape and look good solo. If it's above 50 degrees Fahrenheit, I am sans shirt the majority of the time. Others may never take off their shirt, and that's ok! It's important that the bra you choose feels good and looks good for you.

Moisture Management

Some of us are sweaty gals, and some of us are not, but even for the driest body, it's nice to have a bra with breathable panels, sweat-wicking material, and padding that doesn't pick up moisture to keep us warm and dry. While the style of the bra does factor into its sweat-controlling capabilities (less overall material equals less moisture absorption), the fabric of the bra is the star of the show here.

We tested a number of bras made of wool and found that when it comes to moisture and temperature control, merino does a great job of wicking sweat and maintaining temperature control in both hot and cold conditions. Almost all of the bras we tested — and certainly everything in this guide — did a great job of wicking away sweat to keep us cool or warm, and dry.

As a rule, the sweaty Bettys out there will likely want to avoid a bra with high coverage like the Janji Long Bra or Oiselle Flyout Bra, in favor of a more minimalist style like the Patagonia Switchback Sports Bra.

Many runners at the 2019 Trail World Championships ran in just sports bras. Photo: iRunFar/Meghan Hicks

Try-On Troubles

If a sports bra fits you correctly, it should be fairly easy to put on and take off if it is dry. If you’re coming back inside from a particularly rainy or sweaty run, that can be another story. This is why some folks prefer sports bras that clasp in the back like a traditional bra — no writhing around trying to get a sticky bra up and over our sweaty shoulders. This is particularly important for those with shoulder mobility issues; you’ll want to avoid the pullover styles in favor of a more traditional bra clasp/shoulder strap setup.

Getting a pull-over bra on and off doesn't always have to be a struggle: if it is constructed well and has just the right amount of underbust support (elastic that stretches enough to get over the shoulders without stretching out after a few uses), it should be easy enough to take off, no matter how wet it is. Most of the traditional racerback or pullover styles that made our cut were fairly easy to get in and out of. The Patagonia Switchback Sports Bra is designed with a cross-back strap design that keeps the back of it from getting too sweaty, making it easier to take off, even after a muggy run.

Extra Details

We have come a long way from a sports bra made from two sewn-together jock straps or an ace bandage-like compression strap. As women's participation in sports has steadily increased over the past several decades, particularly in running, the technological application of the sports bra has exploded. Companies have invested in significant research and development to make sports bras more comfortable and functional.

While you can still buy a simple squishy sports bra that lets you smoosh it and forget it, a number of bras have thoughtful details that make your bra more comfortable, breathable, and stylish, that gives increased storage capacity and is made with sustainable materials. The Patagonia Switchback Sports Bra uses 85-100% recycled materials in its polyester.

Some of the bras have an internal panel between the busts that is more breathable than the rest of the bra, decreasing boob sweat. One of the bras we tested even claims to have mineral material to reflect your expended energy back at you. And while that may be a bit of a stretch, the fact remains that apparel companies are finally listening up and have put a lot of time, research, development, and cash into creating quality sports bra products with top-notch look, feel, and performance.

iRunFar's Marissa Harris runs in the Under Armour UA Infinity High Sports Bra, which we named one of the best sports bras for running for large breasts, on the streets of London, England. Photo: iRunFar/Michael Harris

Pockets

A number of bras out there have built-in pockets for phones, gels, and more, some of which we put through their paces in our testing. While we might be wearing a hydration pack with a plethora of pockets for a long trail run, for the easier days when we don't want to carry anything, it's nice to be able to just stow a key, a card, maybe our phone, and go.

A couple of the bras we tested, and what seems most common in the pocket-endowed bra world, have a vertically situated pocket on the back of the bra. While in most bras, this pocket was big enough to accommodate your phone or a couple of snacks, one bra we tested would fit a lot more, including a water bottle or clothing layer.

Another option we tested was a vertical pocket in the front, situated between the bust on the outside of the bra. Others have small pockets under the arms, including one with a key clip in one of the pockets.

And one had an internal pocket that was large enough to stow not only your phone but gels, a key, and a credit card. Chest size, sweat rate, and what you may want to try to stuff your pockets with will all factor into which of these will be right for you.

After testing a number of sports bras with pockets, we named the Oiselle Flyout Bra the best in this category.

iRunFar's Annie Behrend wears the Oiselle Flyout Bra, which we named the best sports bra with pockets, on a sunny day in Oregon. Photo: iRunFar/Annie Behrend

Price

This is a tough one. Generally, in the clothing world, more technology applied equals a higher price. This means that sports bras for bigger-busted folks especially are going to be more expensive, often ranging from $70 or more if you want something with really great support and longevity.

In the budget category, what we call $30 or less for sports bras, we found the Decathlon Kalenji Essential Running Bra to be the highest performing.

In 1889, women around the world breathed a proverbial sigh of relief when the first bra was invented. They could also literally sigh, with bras enabling the corset to start making its way out. The bra style and shapes we know today didn't really become popular until the late 1920s, and it was over 50 years later that the first sports bra was invented.

The popularity of running blossomed in the 1970s, and along with that came the desire for a comfortable, supportive bra that could hold up to the bouncing that came along with our daily run. Glamorise offered the first commercially available sports bra in 1975, marketed to tennis-playing ladies at that time.

In all honesty, the Free Swing Tennis Bra didn't look or function much different than the daily-wear bras of the 1970s: it still had cups, thin straps, and a clasped back, but it promised "net action sides and Lycra Spandex sides … for active women on the go."

A few years later, in 1977, the first true running bra was born, the Jogbra. What started as Hinda Miller, Lisa Lindahl, and Polly Smith's creative use of sewn-together jock straps to cobble together a more supportive option for running has turned into a multi-million dollar industry, with more options than they could have ever imagined.

The original bra patent, which dates back to 1932. Image: Glamorise

And now, in 2023, more than 20 years after Brandi Chastain shocked the soccer world by celebrating on the field by tearing off her shirt during the Federation Internationale de Football Association (FIFA) Women's World Cup, it's no longer uncommon to see women running sans-shirt, and sports bras have advanced more than ever.

While very simple bra styles still exist — and truly, may still be the most popular — the one-size-fits-all ethos is gone. Sports bras now take into consideration band and bust size, bust morphology, sweat rate, level of support, and style.

They are available with or without cups and inserts, straight straps and racerback, pullover, and clasp-behind, with pockets in various locations, and with every type of technology you can imagine.

Still, because every woman's body is completely different, the problems that exist in the regular bra world exist in the sports bra world as well: straps that dig, band sizes that are too tight or too loose in comparison to the bust support needed, and thick and sweaty material. A large part of this has to do with fitting.

Researchers at the aforementioned University of Portsmouth Breast Health Research Program found that nearly 75% of female athletes had never been properly fitted for a sports bra. For athletes with a bust of any significant size, an ill-fitting sports bra can cause back and chest pain, not to mention the pain of trying to wrestle into some bras in the first place. Luckily, many companies are investing in making running more comfortable for women with larger breasts. Our team couldn't decide on the single best sports bra for running for those with larger breasts, but we narrowed it down to our three favorites, the Runderwear Power Running Bra, Brooks Dare Racerback Run Bra 2.0, and Under Armour UA Infinity High Sports Bra.

Here at iRunFar, we gathered a group of six testers with varying bust morphologies in sizes from 32AA to 38DD. We started by researching every possible brand of sports bra we could find, creating a list of over 120 bras.

We then narrowed down that list to 60 different bras of varying styles: compression, encapsulation, pullover, clasp, and more, to test every possible style for each body type.

Our testers tried out these bras on runs from three miles to 12 hours on terrain in Utah, Arizona, Colorado, Oregon, and the U.K., in weather varying from zero to 95 degrees Fahrenheit, in wind, rain, and snow, on sweaty-hot and sweaty-cold days, in both dry and humid climates.

We realize it is impossible to choose the best sports bra for every body type, as we are all unique in our morphologies and preferences, but we did our best to test the widest variety possible so that we could provide accurate recommendations for the best sports bras for running.

There are special circumstances for which we were not able to test: post-mastectomy and for nursing/pregnancy. We aim to test these circumstances for future updates to this living guide.

Please note that in the running world, product models are routinely discontinued, while new ones frequently come to market. At the same time, we here at iRunFar often keep using our top picks in our daily running … they’re our top picks, after all! Sometimes that continued use results in uncovering product failures. With all this — product discontinuations, product introductions, and product failures — in mind, we routinely update our buyer's guides based on past and ongoing testing as well as research by our authors and editorial team. While these updates can appear to be us pushing the newest product, it's anything but that. When we update any buyer's guide, most of the products are likely to remain the same. That matches our goal: to get you in the best gear that you’ll be using for a long time.

iRunFar's Meghan Hicks testing a sports bra with pockets in Arizona. Photo: iRunFar/Bryon Powell

There are so many sports bras for running; how do I choose the best one for me?

Unlike a T-shirt or even running shorts, buying the best sports bra for you can be quite complex. No one runner's body is 100% like another's, and no one is going to fit perfectly into a standardized brand size. If you’re a relatively small-chested runner, you might love the Oiselle Hi Twenty Bra, while runners with larger breasts will want something with significantly more support, like the Runderwear Power Running Bra, which we named the best sports bra for running for women with more significant busts.

The best way to go about finding what's right for you is to check out guides like these and ask a friend with a similar size and morphology what has worked for them and go from there.

Trial and error will likely be necessary. Once you find a sports bra that works the best for you, stick to it! Brands often cycle out or change styles, even popular ones. My favorite — that's me, Alex Potter, co-author of this article — of this list fits so well, better than any bra I’ve had in my life, that I bought 10 of them and will get them all to last as long as possible.

What is a compression sports bra? What is an encapsulation sports bra? What's the difference between the two?

Encapsulation bras, like the Runderwear Power Running Bra, are constructed similarly to a traditional non-sports bra: with a cup for each breast to minimize side-to-side as well as up-and-down movement and prevent the "uni-boob." These bras usually have a clasp in the back and adjustable straps.

A compression bra, like the Oiselle Flyout Bra or the Tracksmith Run Bra, is just that — one that provides support through elastic below the bust and on top, with varying levels of space for the bust. The idea here is to limit motion by compressing breast tissue against the rib cage.

Examples of an encapsulation sports bra on the left and a compression sports bra on the right. Image: Wikipedia

How should my sports bra fit? What is a sign of a poorly fitting sports bra? What is a sign of a sports bra that fits well?

A sports bra for running should be tight enough to keep the breasts in place with minimal bounce but should leave enough room for you to breathe. It shouldn't be so tight that the straps dig painfully into your shoulders or back.

One that is poorly fitting either doesn't provide enough support, is too constrictive on the chest or rib cage, or cuts into the soft tissue around our shoulders and back.

It may take some trial and error to find the best-fitting bra. Always use the size guide provided by the brand for the specific bra model you’re interested in. The best way to get the best fit is to try one on yourself or talk to a friend who is similarly sized to compare. Generally speaking, it's harder for larger-breasted women to find a properly fitting sports bra. The Runderwear Power Running Bra comes with free exchanges so that you can try on as many sizes as needed in order to find the right one for you.

For those of us with rib cages that are proportionately bigger than standard, it can be tough finding a bra, as it can be for those with tiny rib cages. With a bigger rib cage, often, if the chest is compressive enough, the band of the bra is too loose. With a smaller rib cage and bigger busts, if the band fits properly, your boobs might be crying for freedom.

Since most sports bras are, by nature, compressive (as well as some of them being encapsulating), it can be a real challenge to find a bra that is appropriate for your cup size, as sports bras don't often come with separate band and bust measurements or sister sizes, like normal bras.

What are some of the materials sports bras are made of?

Generally, most sports bras are made of some technical material combination: nylon, spandex, or polyester, often in a proprietary blend. However, we did test some sports bras that had a wool blend, which is great for colder days out on the trail. We found Smartwool's Merino Sport Seamless Racerback Bra to be the best sports bra for running in cold weather.

iRunFar's Annie Behrend testing an Athleta sports bra in Oregon. Photo: iRunFar/Annie Behrend

Do I need a specific sports bra material for hot or cold weather?

Not particularly, but finding a bra that is breathable and fast-wicking so that you don't become drenched with sweat and either chafe in hot weather or freeze in cold weather is key. Some bras we tested were comfortable but just had too much material that would hold too much moisture to make this list.

Others have cotton blends that feel particularly cold when wet, so you’ll want to steer away from those. A wool blend bra can be a great option for very chilly days.

The sports bras we found that performed best in cold weather, being able to wick sweat while keeping us warm, were made of a wool blend, with the Smartwool Merino Sport Seamless Racerback Bra coming out on top.

What we’re looking for on hot and sweaty days are bras made of more technical materials so they don't get too soggy, with breathable panels, more minimal coverage on the back, and also able to wick well. For us, the Patagonia Switchback Sports Bra came out on top.

How often should I replace my sports bra?

Conventional wisdom claims between 30 and 70 washes. However, this is highly dependent on how often you wear it, how much the bra gets worn down, and your personal comfort level.

Having a ratty old sports bra is not the same as having a ratty old T-shirt. The biggest element to watch for, and when to retire a bra, is when the seams and supportive material start breaking down.

A bra with sewn seams around the chest and shoulders can get stretched out pretty easily, especially with more budget bras, and that leads to a lower level of support, which can be painful for the breasts and back. Our team found some durability issues with the Patagonia Switchback Sports Bra.

You can go by feel, but if the bra starts becoming threadbare or you start bouncing around, it's probably time to replace it.

iRunFar's Alex Potter in the Janji Long Bra in the snow in Arizona. We named this bra the best longline or crop-style sports bra. Photo: iRunFar/Meghan Hicks

Why are sports bras so expensive?

Ahh, technology. We tested sports bras ranging from $10 all the way up to $80, with the general average price of around $50. For a piece of underwear, this seems out of reach, if not exorbitant.

In general, the more technology and material that goes into the bra, the more expensive it will be — but also, it's likely to last much longer. Bras that incorporate breathable panels, wicking material, pockets, padding, zippers, or clasps are likely to cost more.

Brand name recognition also comes into account. Since some companies now consider sustainability in the manufacture of their sports bras, those costs are up as well.

So, there is a cost versus time versus support trade-off when selecting a sports bra. Unfortunately, for folks with bigger busts, it's likely you’ll have to pay at least $50 for a bra that is supportive enough for running, especially on the trails.

Our top picks for larger breasts are the Runderwear Power Running Bra, with the Brooks Dare Racerback Run Bra 2.0 and Under Armour UA Infinity High Sports Bra rounding out that podium.

If you have a smaller bust and don't mind a bra with lower-quality material that needs to be replaced more often, you’ll likely be comfortable in a very affordable budget bra, like the Decathlon Kalenji Essential Running Bra, which topped our budget category.

Can I use my running sports bra for different activities?

Since running is one of the most high-impact activities we do, a sports bra for it will have to provide a high level of support. Other activities, like walking, hiking, weight lifting, and yoga, may require much less support. While there's no issue with wearing a high-support bra for low-impact activities, many women prefer to have different sports bras to maximize their comfort during activities that don't need quite as much breast support as running does. A moderately supportive sports bra, like the Oiselle Hi Twenty Bra, can be a great option for a variety of activity types.

Despite our extensive search, we’re sure there are sports bras out there we aren't aware of, and there are plenty we tested that are excellent but didn't make our tip-top list. Share your favorite sports bras below!

And if you feel comfortable, please share your size so others can compare what might work best for them. This is a living article, and we’ll continue to test new models and model updates and update this guide as appropriate.

iRunFar's Meghan Hicks testing an Ibex sports bra on a chilly spring day in Arizona. Photo: iRunFar/Alex Potter

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Eszter Horanyi identifies as a Runner Under Duress, in that she’ll run if it gets her deep into the mountains or canyons faster than walking would, but she’ll most likely complain about it. A retired long-distance bike racer, she gave ultra foot racing a go and finished the Ouray 100 in 2017, but ultimately decided that she prefers a slower pace of life of taking photos during long days in the mountains and smelling the flowers while being outside for as many hours of the day as possible. Eszter will take any opportunity to go adventuring in the mountains or desert by foot, bike, or boat, and has lived the digital nomad lifestyle throughout the west for the past seven years.