Side view of BRANWYN Essential Racerback Sports Bra, Merino sports bra in grey. Nontoxic sports bra with removable pads.
Back view of woman stretching in grey Merino racerback sports bra by BRANWYN. Sustainable Merino bra offering breathable, odor-resistant comfort
Front view of grey Merino wool sports bra with sleeves for removable bra pads. Made of eco-friendly Merino Wool which is naturally sweat wicking.
Front view of BRANWYN Merino wool Racerback Sports Bra in raven grey. A sustainable bra designed for workouts, hiking, biking and more.
Back view of grey BRANWYN Racerback Sports Bra. Eco-friendly Merino wool sports bra for workouts and everyday comfort.
Two women stretching in yoga studio wearing grey Merino racerback sports bra by BRANWYN. Body hugging compressive Merino made for movement while remaining soft and breathable.
Front view of black Essential Racerback Sports Bra by BRANWYN. Merino Wool compressive bra wicks sweat and keeps you dry through hikes, skis and workouts.
Close-up detail of racerback design on BRANWYN Sports Bra in black. Seamless Merino wool provides compressive, breathable support.
Front view of BRANWYN Merino wool Racerback Sports Bra in black. Eco-friendly nontoxic sports bra for women, breathable and moisture-wicking.
Yoga stretch in BRANWYN Racerback Sports Bra. Sustainable Merino bra for women, flexible and supportive for workouts and outdoor activity
Front view of black Merino Wool sports bra, stink free sports bra made of natural fibers that wick sweat and keep you dry and cool.
Close up of woman stretching in black BRANWYN Racerback Sports Bra designed with compression knit to keep you snug and supported through workouts.
Woman stretching with hands over her head in the black BRANWYN Racerback Sports Bra. Sustainable Merino wool sports bra for women.
Woman stretching in camel yoga pose in the Essential Racerback Sports bra in black by BRANWYN. Seamless and sweat wicking Merino sports bra to keep you dry during workouts.
Flatlay of the BRANWYN Racerback Sports Bra in black. Seamless Merino compression bra with sleeves for pads designed for exercise.
Back detail view of green BRANWYN Racerback Sports Bra showing racerback designed, ribbed Merino knit, and compressive fit for workouts and movement.
Yoga stretching in green Merino sports bra, BRANWYN Essential Racerback Sports Bra. Compressive seamless Merino fabric hugs the body while staying breathable.
Side view of BRANWYN Racerback Sports Bra in green. Eco-friendly Merino bra made for hiking and gym with lightweight, odor-resistant comfort.
Woman stretching in BRANWYN Racerback Sports Bra in agave green. Seamless Merino activewear built for performance and sustainability.
Front view of green racerback sports bra, Merino Wool sports bra perfect for hiking, skiing, yoga, and comfortable for everyday wear.
Back view of BRANWYN Racerback Sports Bra in green. Seamless Merino wool provides compressive, breathable support without rubbing or chafe.
Side view of model stretching in Merino Racerback Sports Bra by BRANWYN in agave green, ideal for yoga, pilates, gym workout bra.
Woman doing yoga in BRANWYN Racerback Sports Bra. Sustainable Merino compression sports bra made for movement.
Woman standing beside a river in BRANWYN Racerback Sports Bra in natural white. Merino seamless sports bra with sleeve for pads.

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 377 reviews
73%
(275)
23%
(87)
3%
(11)
0%
(1)
1%
(3)
J
Jocelyn (Sutton, US)
So Comfortable!

Loving this bra so far! Provides support without being restrictive.

A
AB (Dallas, US)
So comfy!

Got the sports bra and the busty bra - wishing I also ordered the regular bra since the busty might be too much bra for me. Wore the sports bra on a 20 hour travel day and it was great, and wore it on some runs before then - also wonderful! Excited to keep trying them out.

N
Nancy Hess (Richland, US)
Support without constriction

Really like the wide band. Very comfortable for running but also looks great under a sun shirt - wearing it like a croptop.

V
Vickie B (Atlanta, US)
Serious comfort and support

I have never worn a racerback bra. Honestly it is the most comfortable bra I have ever worn. I bought two and have thrown away all my old bras.Thank you Branwyn!

V
Vicki Miller (Granbury, US)
Racerback Sports bra

Love this bra. But I should have bought the cup inserts.

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.