BRANWYN's seamless Merino wool Bralette bra in Black. Natural fiber, plastic free activewear.
Close up of woman wearing black Merino bralette and raising arms over her head.
Close-up of BRANWYN Essential Merino Bralette straps, adjustable design with criss-cross option for racerback bra style.
Front view of woman stretching in BRANWYN Essential Bralette in black, soft breathable Merino bralette.
Front view of BRANWYN Essential Bralette in black, seamless Merino wool bra.
BRANWYN Essential Bralette made of seamless Merino wool, woman stretching in naturally temperature-regulating bra.
Back view of woman in BRANWYN Merino underwear set, seamless natural fiber bra and thong.
Back view of woman wearing a black BRANWYN Essential Merino Wool Bralette. Natural, toxin-free Merino wool bra designed for breathable everyday comfort.
Woman smiling in BRANWYN Merino bra and matching underwear set in black, soft seamless bras and underwear for women.
Close up of woman wearing black natural fiber Merino bra and underwear.
Woman standing in a BRANWYN Merino wool bra and underwear set, seamless natural fiber bra for everyday comfort.
Front view of BRANWYN Essential Bralette in Light Nude, seamless ZQ Merino wool bralette.
Woman stretching in BRANWYN Essential Bralette in Light Nude, naturally moisture-wicking Merino bralette for hiking and working out.
Back view of BRANWYN Essential Bralette in Light Nude, seamless Merino design with adjustable straps for comfort.
Yoga practice in Light Nude Essential Bralette by BRANWYN, lightweight performance bralette made for movement.
Woman wearing Merino bralette and Merino underwear set, soft seamless design for comfort.
Woman wearing BRANWYN black Merino Wool bralette and underwear set, naturally soft and breathable innerwear.
Front view of grey BRANWYN Essential, a seamless Merino performance bra for everyday movement.
Woman stretching in warrior yoga pose wearing BRANWYN Merino bralette and underwear set in Luna Grey.
Back view of BRANWYN Essntial Bralette, breathable wool bra with adjustable straps in Luna grey.
Woman stretching in BRANWYN Merino bralette and underwear set, designed for everyday comfort.
BRANWYN Essential Bralette in Luna Grey, front view of seamless Merino bralette with natural odor resistance.
Woman wearing BRANWYN Essential Bralette in Luna Grey, adjustable Merino straps crossed for support.
Woman wearing BRANWYN Essential Bralette in Dark Nude, seamless wool bralette for everyday comfort.
BRANWYN Dark Nude Essential Bralette with matching Merino underwear, sustainable toxin-free natural fiber underwear set.
Front view of BRANWYN Essential Bralette in Dark Nude, supportive seamless Merino bralette.
Side view of BRANWYN Essential Bralette in Dark Nude, seamless Merino bralette designed to regulate body temperature.
Back view of BRANWYN Essential Bralette in Dark Nude, seamless Merino bralette with adjustable straps.
Fabric detail of BRANWYN Essential Bralette in Dark Nude, soft seamless Merino knit design.
BRANWYN sustainable Merino bralette and underwear set, seamless design created for comfort.
Back view of BRANWYN Essential Merino Bralette in Dark Nude, cross straps for optional racerback style.
Woman in BRANWYN Essential Bralette and Merino underwear set in Dark Nude, seamless natural fiber innerwear.
BRANWYN Warm Nude Essential Bralette, lightweight seamless Merino wool bralette for comfort.
Close-up of BRANWYN Essential Bralette straps, adjustable buckles for customized fit.
Woman stretching in BRANWYN Essential Bralette and Merino wool underwear set in Light Nude.
Detail view of BRANWYN Essential Bralette in Warm Nude, side profile with floral patterned Merino knit.
Woman smiling in BRANWYN Essential Bralette in Warm Nude, soft seamless Merino bralette.
Back view of woman wearing BRANWYN Essential Bralette in Warm Nude with matching Merino underwear.
Woman stretching in BRANWYN Warm Nude Essential Bralette, side angle of breathable Merino bra.
Side view of woman stretching in BRANWYN Essential Bralette and Merino underwear set in Warm Nude.
Branwyn seamless Merino wool Bralette in undyed natural white
Branwyn seamless Merino wool Bralette undyed natural white
Front view of BRANWYN Essential Bralette in Natural White, breathable moisture-wicking Merino bralette.
Side view close-up of BRANWYN Essential Bralette in Natural White, showing breathable Merino wool knit fabric.
Front view of a model wearing BRANWYN Natural fiber Seamless Merino Wool Essential Bralette in Transformative Teal.
Side view of a model wearing BRANWYN Sustainable Seamless Merino Wool bralette in Transformative Teal.
Side view of a model wearing BRANWYN Merino Wool seamless bra in Transformative Teal.
Women doing yoga in BRANWYN Sustainable Seamless Merino Wool Essential Bralette and Essential Boyshort in Transformative Teal.
Close-up of BRANWYN Essential Bralette in Future Dusk purple, seamless Merino wool fabric detail.
Close-up of BRANWYN Future Dusk Essential Bralette straps, seamless Merino wool bralette with adjustable straps.
Woman in sunlight wearing the BRANWYN Essential Bralette and Merino wool underwear set in Future Dusk, made from breathable natural fibers.
BRANWYN Future Dusk Essential Bralette, soft seamless Merino bralette designed for performance.

Essential Bralette

$52.00 USD
3703 reviews
3703 reviews
Merino wool benefits listed with icons: [Sheep icon] Merino wool = Sweat free freshness [Knit icon] Seamless knit = Second skin comfort [Sustainability icon] ZQ Merino = Ethical and sustainable fiber
BRANWYN Merino wool Essential Bralette size guide slider.
Quantity:
Color:Black
Size:XS
In stock

Bralette Size Guide

Size guide banner

All our knitwear has a lot of stretch, so you might be able to wear two different sizes. If you are unsure, size up.

A B C D
28 XS/S XS/S S S
29/30 S S S S/M
32 S/M S/M M M
34 M M M/L M/L
36 M/L M/L L L
38 L L L/XL L/XL
40 XL XL XL XXL
42 XXL XXL XXL XXL

Tell me more about the fit

Our Performance Innerwear is meant to fit snugly on the body. If you prefer a looser fit, we recommend sizing up. If it feels just a little tight and you aren't sure if the next size up would be better, we recommend wearing and washing it a few times to see if it breaks in to your liking before exchanging it for another size.

Will it stretch out?

Not really.  Our Performance Innerwear does give a bit with wear, but instead of becoming loose, it will mold to your body more over time. 

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.

Bralette Size Guide

Size guide banner

All our knitwear has a lot of stretch, so you might be able to wear two different sizes. If you are unsure, size up.

A B C D
28 XS/S XS/S S S
29/30 S S S S/M
32 S/M S/M M M
34 M M M/L M/L
36 M/L M/L L L
38 L L L/XL L/XL
40 XL XL XL XXL
42 XXL XXL XXL XXL

Tell me more about the fit

Our Performance Innerwear is meant to fit snugly on the body. If you prefer a looser fit, we recommend sizing up. If it feels just a little tight and you aren't sure if the next size up would be better, we recommend wearing and washing it a few times to see if it breaks in to your liking before exchanging it for another size.

Will it stretch out?

Not really.  Our Performance Innerwear does give a bit with wear, but instead of becoming loose, it will mold to your body more over time. 

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 award-winning Essential Bralette is where it all started: the original high-content Merino wool seamless piece. It's made with our proprietary GLDNspun™ seamless construction in 81% Merino wool, so it feels like a second skin and stays fresh (funk-free, even) all day.

It's our lightest coverage bra, with no underwire and nothing to dig or roll. Made for light activity and everyday wear, it has convertible straps that work straight or crossed in the back. Want more coverage? Our Essential Busty Bra has you. Between sizes? Go up one.

Bonus:  Our ZQ+™, Woolmark™, and RWS-certified GLDNspun™ seamless Merino wool is also regenerative and sustainable.

Double Bonus: We hear it all the time: our Bralette really feels like going braless.

For more, scroll down to check out our customers’ reviews!

COMPLETE THE SET

Side view of BRANWYN Essential Bikini Merino underwear in warm nude. Soft, breathable, and odor resistant, sustainable underwear. Warm nude Merino wool panties in a bikini cut by BRANWYN. Made from natural fiber Merino wool to provide a sustainable solution for eco-conscious women.
Essential Bikini
$38.00 USD
Side profile of woman wearing BRANWYN Essential Boyshort seamless Merino Underwear for women in black. Back view of woman in black bralette and matching black Merino wool boyshort underwear for women. Made of quick-drying natural fibers that are gynecologist recommended.
Essential Boyshort
$42.00 USD

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

Benefits of Merino wool icon: Odor-resistant quality of seamless Merino wool

Odor Resistant

BUTTERY SOFT NATURAL FIBER

GYNECOLOGIST APPROVED