Woman in a Dark Nude BRANWYN Essential Busty Bra, a seamless Merino wool sports bra for larger busts.
Side view of the Dark Nude BRANWYN Busty Bra, a natural fiber Merino wool pullover bra for a larger bust.
Close-up of the Dark Nude seamless Merino wool Busty Bra by BRANWYN, a bra for large breasts.
Detail of the wide adjustable strap and buckle on the Dark Nude Merino wool Busty Bra for added comfort.
Side view of the black BRANWYN Busty Bra, a seamless Merino wool sports bra for large breasts.
Front view of the black Busty Bra in size XXL (40DDD), a seamless Merino wool pullover bra for large busts.
Back view of the black Merino wool Busty Bra in size XXL (40DDD) with wide adjustable straps, by BRANWYN.
Back view of the black BRANWYN Busty Bra in size 32F with adjustable criss-cross straps for a larger bust.
Woman smiling in the black BRANWYN Busty Bra, side view of a seamless Merino wool bra for large breasts.
Woman stretching in the black Busty Bra and seamless underwear, natural fiber activewear by BRANWYN.
Woman adjusting the wide shoulder strap of the black BRANWYN Merino wool Busty Bra.
Woman leaning into a stretch in the black seamless Merino wool Busty Bra, a natural fiber sports bra.
Woman with silver hair laughing in the black BRANWYN Busty Bra, a seamless Merino wool bra for large busts.
Back view of the black BRANWYN Busty Bra showing wide adjustable straps for comfort.
Woman with curly hair smiling in the black seamless Merino wool Busty Bra by BRANWYN.
Front view of the black BRANWYN Busty Bra and seamless underwear, a pullover Merino wool bra for a larger bust.
Side view of the black seamless Merino wool Busty Bra, a natural fiber sports bra by BRANWYN.
Woman in the Light Nude BRANWYN Busty Bra in size XXL, a seamless Merino wool bra for large breasts.
Back view of the Light Nude Busty Bra in size XXL with straps crossed, worn with seamless Merino wool underwear.
Front view of the Light Nude BRANWYN Busty Bra, a seamless natural fiber Merino wool bra.
Back view of the Light Nude BRANWYN Busty Bra with wide adjustable straps for a larger bust.
Woman smiling with hands on hips in the Light Nude BRANWYN Busty Bra and seamless Merino wool underwear.
Side view of the Light Nude seamless Merino wool Busty Bra, a natural fiber sports bra by BRANWYN.
Back view of the Light Nude BRANWYN Busty Bra and matching seamless underwear.
Woman with silver hair in the Light Nude BRANWYN Busty Bra and seamless Merino wool underwear set.
Back view of a woman in the Light Nude Merino wool Busty Bra with thick, comfortable straps.
Side view of a woman in the Light Nude BRANWYN Busty Bra, a seamless Merino wool bra.
Back view of a woman with a ponytail in the Light Nude Busty Bra and seamless Merino wool underwear.
Woman stretching her arms overhead in the Luna Gray BRANWYN Busty Bra, a Merino wool bra for large breasts.
Back view of the Luna Gray BRANWYN Busty Bra with adjustable straps.
Woman with silver hair in the Luna Gray seamless Merino wool Busty Bra and underwear set by BRANWYN.
Side profile of a seated woman in the nude BRANWYN Busty Bra, a seamless Merino wool bra for busty women.
Woman smiling in the Warm Nude BRANWYN Busty Bra and seamless Merino wool underwear set.
Close-up of the crossed adjustable straps on the Warm Nude BRANWYN Merino wool Busty Bra.
Woman in a camel yoga pose wearing the BRANWYN Busty Bra and seamless Merino wool underwear.
Side view of the Natural White BRANWYN Busty Bra, a seamless Merino wool bra for large-chested women.
Woman laughing in the Natural White Busty Bra, a Merino wool sports bra for large-chested women.
Woman hula hooping in the Natural White Busty Bra and black Merino wool leggings, odor-resistant activewear.
Woman stretching in sunlight in the Natural White seamless Merino wool Busty Bra by BRANWYN.
Front view of the Future Dusk BRANWYN Busty Bra, a seamless Merino wool bra for large busts.
Woman in the Future Dusk BRANWYN Busty Bra, a natural fiber Merino wool pullover bra for a larger bust.
Woman in the Transformative Teal BRANWYN Busty Bra, a seamless natural fiber Merino wool bra.
Close-up of the Transformative Teal seamless Merino wool Busty Bra by BRANWYN.
Woman with silver hair in the Transformative Teal Busty Bra and matching seamless Merino wool underwear.

Essential Busty Bra

$62.00 USD
3859 reviews
3859 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.

Meet the award-winning Essential Busty Bra, made from seamless Merino wool for second-skin comfort, no restriction, and more coverage than our Essential Bralette. It’s knit with our proprietary GLDNspun™ construction in 81% ZQ+™ Merino wool, so it 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

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Essential Hipster
$40.00 USD
Side view of the black BRANWYN Essential Boyshort, seamless underwear made from Merino wool for women. Back view of the black Essential Boyshort and bralette, quick-drying, OB-GYN recommended Merino wool underwear.
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