A woman wearing a brown Merino wool bra and underwear against a plain background
Woman wearing a brown seamless Merino wool bra against a neutral background.
Woman wearing a brown Merino wool supportive bra for large breasts against a white background.
BRANWYN Merino wool Busty Bra strap detail, adjustable buckle for added comfort and supportive fit.
Side view of BRANWYN's Busty Bra in Black, seamless sports bras for large breasts.
Front view of BRANWYN’s Essential Busty Bra, eco-friendly pullover bra for large bust.
Model showing adjustable strap detail on BRANWYN Busty Bra in black, Merino wool seamless bra.
Model showing back view of Black Essential Busty Bra by BRANWYN with adjustable criss-cross straps for added bust support as a supportive bralette for large busts.
Model smiling while showing side angle of a black natural fiber bra, Merino bra for large breasts.
Woman stretching in natural fiber seamless bra in black and matching Merino underwear.
Woman stretching supportive straps of a Busty Bra: Merino bra for large breasts.
Woman smiling and stretching in Merino wool Busty Bra, a sports bra for large breasts
Woman laughing while wearing black Merino wool supportive bralette for a large bust.
Back view of BRANWYN natural fiber bra showing adjustable straps for support and comfort.
Front view of BRANWYN black Busty Bra, natural fiber merino wool seamless bralette.
Woman posing in black Merino pullover bra and matching underwear by BRANWYN.
Athletic woman wearing black Merino wool seamless sports bra for large breasts.
Woman smiling and wearing nude Merino wool bra for large breasts and matching Merino underwear.
A woman standing with her back facing the camera in a Merino wool nude bra and underwear set.
Front view of BRANWYN Busty Bra in Light Nude, natural fiber, toxin-free Merino wool bralette.
Back view of BRANWYN Essential Busty Bra in Light Nude, seamless merino bralette with adjustable straps.
Woman smiling in BRANWYN natural fiber sports bras for large breasts and Merino wool underwear set.
Side view of BRANWYN Busty Bra in Light Nude, seamless Merino pullover bra for large bust.
Back view of BRANWYN Essential Busty Bra in Light Nude, seamless Merino bralette with adjustable straps.
Woman smiling with hands on her hips, wearing a light nude bra and underwear set including a Merino sports bra designed for large breasts.
Back view of woman wearing light nude Merino bra with thick supportive straps.
Side view of woman in BRANWYN Merino wool seamless bra.
Back view of woman with blonde hair in a ponytail wearing Wool underwear set featuring a Merino bra for large breasts.
Woman stretching hands above her head in a light grey supportive Merino wool bra for large breasts.
Back view of BRANWYN Essential Busty Bra in Luna Grey, seamless merino bralette with adjustable straps.
Woman wearing BRANWYN Busty Bra Luna Grey, Merino wool seamess bralette for large busts.
Side profile of model sitting and wearing a nude seamles Merino wool BRANWYN bra, Merino bralette for busty women.
Woman smiling and walking in BRANWYN Warm Nude Merino wool bra and underwear set.
Close up view of BRANWYN Busty Bra cross straps, a seamless merino bralette with adjustable supportive straps.
Woman stretching into camel yoga pose in a seamless bra and underwear set from BRANWYN.
Side view of woman wearing BRANWYN eco-friendly Busty Bra in Natural White, Merino bralette for large chested women.
Woman stretching in BRANWYN Essential Busty Bra in Natural White, sports bra for large chested women.
Woman hula hooping in BRANWYN sustainable bra and Merino leggings, odor-resistant activewear for women.
Woman stretching in the sunlight, wearing a bun and a white seamless Merino wool bra.
Front view of BRANWYN Essential Busty Bra in Future Dusk, a pullover bra for large busts.
Front view of BRANWYN Essential Busty Bra in Future Dusk, Merino bralette designed for busty women.
Front view of a model wearing BRANWYN natural fiber Seamless Merino Wool Essential Busty Bra in Transformative Teal.
Model wearing BRANWYN Sustainable Seamless Merino Wool Essential Busty Bra in Transformative Teal.
Front view of a model wearing BRANWYN Natural fiber Seamless Merino Wool Essential Busty Bra and matching underwear in Transformative Teal.

Essential Busty Bra

$62.00 USD
3791 reviews
3791 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 Busty Bra size guide slider.
Color:Black
Size:XS
Quantity:
In stock

Busty Bra 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.

C/D DD F G
28 XS XS XS XS/S
30 XS/S XS/S XS/S S
32 S S S S/M
34 M M M M/L
36 M/L M/L M/L M/L
38 L L L L/XL
40 XL XL XL XL/XXL
42 XL/XXL XXL XXL XXL
44 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.

Busty Bra 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.

C/D DD F G
28 XS XS XS XS/S
30 XS/S XS/S XS/S S
32 S S S S/M
34 M M M M/L
36 M/L M/L M/L M/L
38 L L L L/XL
40 XL XL XL XL/XXL
42 XL/XXL XXL XXL XXL
44 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.

The award-winning Essential Busty Bra is made from our proprietary GLDNspun™ seamless construction in 81% Merino wool. It gives you second-skin comfort without restriction, with more coverage than our Essential Bralette, and stays breathable and odor-resistant all day.

Best for light activity and everyday wear, this underwire-free design eliminates digging while maximizing mobility. Convertible straps can be worn straight or crossed for added support.

Our Busty Bra reminds you how comfortable it feels to be in your own skin. If you’re between sizes, we recommend going up one size.

Bonus: All our GLDNspun™ seamless Merino wool bras are:

  • 81% ZQ+ certified Merino wool
  • Woolmark certified
  • RWS certified
  • Certified BPA-free and PFAS-free

Double Bonus: Named the best bra (along with the Essential Bralette) in WIRED's guide to the best Merino wool clothes

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

COMPLETE THE SET

Side view of woman wearing grey high waisted Merino underwear by BRANWYN. The Essential Hipster high waisted moisture wicking underwear. Woman wearing BRANWYN's Essential Hipster: light grey high waisted Merino Wool Underwear and matching Merino Wool bra.
Essential Hipster
$40.00 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