Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures, running and the gym. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement.
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Essential Racerback Sports Bra - BRANWYN | Performance Innerwear
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t
Image shows a woman wearing BRANWYN's Compressive Racerback Sports Bra, a compression sports bra designed for high-impact adventures. This compressive, body-hugging sports bra features an updated racerback and shoulder strap design for a more inclusive fit, ensuring maximum comfort and freedom of movement. Made from a heavy-weight 4-way Merino knit with a POWRspun blend of 76% extra fine Merino, 14% nylon, and 10% elastane, it provides breathable, sustainable support. BPA, PFAS, and forever-chemical free, t

Essential Racerback Sports Bra

Sale price$85.00 USD

Color:Black
Size:XS
Quantity:
In Stock


Racerback Sports Bra Size Guide

Based on community feedback, we recommend starting with your usual size. 

Scroll right to view the entire size chart.

A/B C D DD F G
<30 XS XS XS XS S S
31-32 S S S S M M
33-34 M M M M L L
35-36 L L L L XL XL
37-38 XL XL XL XL XXL XXL
39-41 XXL XXL XXL XXL XXL XXL

Tell me about fit:

Our Essential Racerback Sports Bra is designed to fit snugly against your body for maximum support. To find your best fit, start with the band—our sizing is based on field testing where two fingers fit comfortably between the band and your body, but not more.

How to measure your band size:

  • Measure snugly around your rib cage, directly under your bust.

  • Add 3 inches to that measurement.

    • Example: A 31" rib cage + 3 = 34, so your band size is 34.

  • If the result is an odd number, round UP to the next even band size.

    • Example: A 32" rib cage + 3 = 35 → round up to 36.

Our Performance Innerwear is meant to feel snug. If you prefer a slightly looser fit, we recommend sizing up. If it feels just a bit tight, try wearing and washing it a few times—most bras gently relax and mold to your body over time before considering an exchange.

Will it stretch out?
Yes! Performance Innerwear is designed to give a little with wear and washing, molding to your shape while keeping support and comfort.

Racerback Sports Bra Size Guide

Based on community feedback, we recommend starting with your usual size. 

Scroll right to view the entire size chart.

A/B C D DD F G
<30 XS XS XS XS S S
31-32 S S S S M M
33-34 M M M M L L
35-36 L L L L XL XL
37-38 XL XL XL XL XXL XXL
39-41 XXL XXL XXL XXL XXL XXL

Tell me about fit:

Our Essential Racerback Sports Bra is designed to fit snugly against your body for maximum support. To find your best fit, start with the band—our sizing is based on field testing where two fingers fit comfortably between the band and your body, but not more.

How to measure your band size:

  • Measure snugly around your rib cage, directly under your bust.

  • Add 3 inches to that measurement.

    • Example: A 31" rib cage + 3 = 34, so your band size is 34.

  • If the result is an odd number, round UP to the next even band size.

    • Example: A 32" rib cage + 3 = 35 → round up to 36.

Our Performance Innerwear is meant to feel snug. If you prefer a slightly looser fit, we recommend sizing up. If it feels just a bit tight, try wearing and washing it a few times—most bras gently relax and mold to your body over time before considering an exchange.

Will it stretch out?
Yes! Performance Innerwear is designed to give a little with wear and washing, molding to your shape while keeping support and comfort.

Seamless, compressive support hugs your body while body-mapped contours provide added lift, separation, and stability. The integrated shoulder strap and racerback design maximizes mobility, sitting squarely on your shoulders and away from your neck, and traps for all-day comfort. Pullover style with removable pad sleeves (pads not included) adds versatility.

Perfect for high-impact adventures like trail running, single-track laps, boulder projects, or your next HIIT session, this bra moves with you wherever your day—or your workout—takes you.

Heavyweight 4-way POWRspun™ knit combines 76% extra-fine ZQ Merino, 14% nylon, and 10% elastane for durability, stretch, and breathability. Naturally sustainable and BPA-, PFAs-, and forever-chemical-free, it keeps you supported, fresh, and funk-free.

  • built with higher compression and heavier material than our Bralette and Busty Bras
  • body-mapped contours provide additional support and separation 
  • sleeves for removable bra pads (pads not included)
  • pullover style with a racerback design for a full range of motion

Bonus: Our ZQ, OEKO-TEX 100, and RWS-certified Merino is also regenerative and sustainable.

Double Bonus: We hear it all the time… Our Racerback Sports Bra is the high-five you need to crush your next PR.

PERFORMANCE WITHOUT COMPROMISE

Designed for superior performance and maximum comfort—it all starts with Merino wool. Super-soft, ultra-fine Merino wicks sweat to keep you dry, fresh, and funk-free. The natural crimp of its fiber traps air so you stay cool when things heat up and keep warm when there’s a chill.

Moisture wicking

Naturally breathable

Temperature regulating

Odor Resistant

BUTTERY SOFT NATURAL FIBER

GYNECOLOGIST APPROVED

Customer Reviews

Based on 374 reviews
71%
(264)
23%
(85)
5%
(17)
1%
(3)
1%
(5)
K
Karen Gray (Santa Clara, US)
Training for a big trek

I have been wearing both low and medium impact bras on training hikes. So far so good. They are comfortable with my backpack and stay dry. I needed something for a strenuous week long trek I have coming up.

J
J Philly (New York, US)
Kept but too long in the torso

Compression good (high!). Fabric good. Color lovely. But as a busty short gal, this is too long in the torso. Would be great if there was a short/busty version.

Hi J Philly,

Thank you so much for your feedback! We appreciate you taking the time to share your experience. We're glad to hear you liked the compression and fabric, and we hear you on the fit. We'll be sure to pass your comments along to our design team for future consideration. Your input truly helps us improve!

J
Jen (Ashburn, US)
Love it—my new favorite bra!

I didn’t think I could love any bra more than the Busty, but I was wrong. The essential racerback sports bra is perfect in every way. It’s incredibly supportive (36DD here), breathable and comfortable, and I love that it’s thick enough that my headlights don’t show. The size medium fits me perfectly and it’s now my go-to everyday bra. I just wish it came in more colors, I’d love a flesh-tone so I could wear it under white tees and tanks.

H
Heather B (Warren, US)
Great bra!

I’m slowly replacing my workout wardrobe and bras have been the hardest switch. This one is great for me and I’ll be back! For reference, I wear 34B and the small fits great.

B
BRIONNA Parmely (Seattle, US)
comfortable and no smell

Wore this for a 6.5 mile run and aft it dried it didn't smell at all! Appreciate the full coverage and support, high quality merino products!

MONEY BACK GUARANTEE FOR 14 DAYS

Not sure about wool?

Merino is super soft like cashmere!

We know you'll love it! But just in case you don't, we’ll give you a full refund.