Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.
Woman wearing BRANWYN's Essential Bikini, a underwear from the Essential Collection. Made from soft, moisture-wicking Merino wool using seamless technology, this performance innerwear provides performance, comfort, and sustainability. The fabric is free from BPA, PFAS, and forever chemicals.

Essential Bikini

Sale price$36.00 USD

Color:Black
Size:S
Quantity:
Only 1 unit left


Underwear Size Guide

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

WAIST HIPS PANT
XS 23 - 24 32 - 34 0 - 2
S 24 - 26 34 - 36 2 - 4
M 26 - 28 36 - 38 6 - 8
L 28 - 30 38 - 40 10 - 12
XL 30 - 32 40 - 42 12 - 16
XXL 32 - 34 42 - 44 16 - 18

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, then we recommend wearing and washing 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.

Underwear Size Guide

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

WAIST HIPS PANT
XS 23 - 24 32 - 34 0 - 2
S 24 - 26 34 - 36 2 - 4
M 26 - 28 36 - 38 6 - 8
L 28 - 30 38 - 40 10 - 12
XL 30 - 32 40 - 42 12 - 16
XXL 32 - 34 42 - 44 16 - 18

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, then we recommend wearing and washing 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.

Our Essential Bikini is designed to stay put and move with you, while keeping you funk-free, dry, and comfortable throughout your entire day no matter your adventure. Crafted from super-fine Merino wool, our seamless design and comfort waistband eliminate digging and rolling during your hike, ride, climb, workout, or vinyasa — so comfortable, you’ll forget you’re even wearing it!

Bonus: Our ZQ, OEKO-TEX, and Responsible Wool Standard certified Merino is also regenerative and sustainable. (which also means it is free of BPA, BHP, and toxic forever chemicals).

Double Bonus: Our Bikini is great in and around the water. It dries in the blink of an eye.

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

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 747 reviews
88%
(657)
11%
(80)
1%
(4)
0%
(2)
1%
(4)
R
Rue Teel (Dover, US)
Comfortable but definitely small

I bought a bra + underwear set to try for bike commuting. The underwear are comfortable but definitely on the small size- I’m between a M & L and would almost consider sizing up, if snug undies wasn’t good for my purposes.

K
Kate Weymer (Seattle, US)
Worth investing

We’ve been trained to expect 6/$30 deals for garbage undies at questionable retailers. These are so much better. They fit great, they do everything they say in terms of staying fresh and odor free as well as keeping your temp comfy. I know it’s an investment to turn over your undies collection but I do recommend it if you are able to. Even if you can just swap out 3 pairs I’d recommend wearing them on days you’d like to avoid swamp butt or less than fresh smells on your body. I’m very satisfied and ordered more.

R
Rebekah Aumen (Charlotte, US)
Everything Branwyn makes is a win

I now own 4 pairs of underwear, 2 bras, and 2 joggers. I wear almost branwyn everything every day. I love it all. Not itchy. Temp regulating. So comfy. I love it all.

A
Amanda McAndrew (Redmond, US)

Essential Bikini

J
JSch (Detroit, US)
Love the new color option

I'm a life long Branwyn fan! I love the new color!

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.