Pure Bikini Brief
Crafted in ultra-fine Merino wool, this bikini brief offers feather-light comfort and odor-resistance. A low-profile cut and smooth silhouette transition seamlessly from performance to everyday wear.
Material:
- 100% Merino Wool
- 17.5μm
- 180g/m²
Care:
- Machine Washable. Max 30°C on a gentle cycle
- Do not bleach. Do not dry clean. Do not tumble dry. Lay flat to dry. Cool iron if needed.
- For women — take your usual size for the best fit and comfort.
- Our model is 174 cm / 5’8”, wears a size M for a naturally relaxed fit.
- Our model is 176 cm / 5’9”, wears a size M for a natural fit.
- Enjoy free shipping on all orders over $70.
- For hygiene and safety reasons, this underwear piece is considered final sale and cannot be returned or exchanged.
Daily Wear
Active Wear
Precision-cut triangle silhouette with interior flat-lock seams that feel like silk against your skin.
No more irritating tags or scratchy stitches—just smooth, invisible comfort that disappears under your clothes.
Experience weightless comfort with our ultra-thin elastic waistband that feels like wearing nothing at all.
This innovative band stretches and recovers perfectly, leaving zero marks or indentations on your skin—even after long days.
The contoured design hugs your curves naturally while maintaining its shape throughout the day.
Finally, underwear that offers full coverage without sacrificing style—secure, stable, and surprisingly liberating.
Made from natural Australian Merino wool, it’s soft, breathable, and gentle on the skin, with natural antibacterial properties.
It’s designed to fit your body’s natural curves without tightness. The waistband is soft and elastic for all-day comfort.
No. The Merino wool we use is ultra-fine and soft, providing a comfortable, itch-free experience even when worn all day.
No. Merino wool naturally resists bacteria and odor, keeping the brief fresh even after sweating or long wear.
Exactly what I was looking for. I'm 5'5 and weigh 157 lbs. I'm usually a medium in underwear but I ordered a large because A lot of comments said to size up; glad I did. The large fits just right. I Got the cinnamon color. As a woman of color, I needed something that matched my skin tone and these are the perfect "nude" for my skin tone. I do a lot of work outdoors and needed something to combat "swamp ****" lol... Regular cotton panties just soak up sweat and take forever to dry, leaving me musty down there... These resist odor and dry fast. Will definitely be ordering more.
So soft, so comfortable and well made! Thank you
As with other reviewers,I went with a size up from my regular size and I am glad I did. There’s no pantry line and they are quite soft and comfortable. For reference i am 5’6” 138lbs and bought a large.
Great fabric, amazing fit!
Fits very well comfy and ****!
I have tried a couple of different brands of wool bikini underwear and Unbound Merino is the best! They are lightweight, elastic doesn’t roll, silky soft material! I love Unbound Merino’s triangle wool bra also!
Very soft, very comfortable. I would gladly purchase another pair in the future!
Very light weight and comfortable, temperature regulating, and no show panty lines.
Great fabric. Very comfortable, almost like they are not even there.
Perfect! Great fit, comfortable, breathable
Love it!
Ordered a size up for comfort. Overall I like them. The gusset could be longer.
I bought a pair to try them out and love them. Will definitely be ordering more just wish they came in a nude color
Comfy, great fit, wicks moisture. Nice quality merino fabric
Suuuper soft and stays put! I love that. However, they run small. I picked my size according to site measurements and they’re still a little snug. I might size up one more size on my next order.
Love them, fit great and true to description.
I was skeptical that these would work as I previously tried the bras, but the fit didn’t work for me. I love these underwear!!! The fit is perfect and they don’t ride up. I hardly feel as though I’m wearing anything. I took them on a 2 week vacation to the Bahamas and they breathed so well with no itching in 90 degree heat. The best part is that I would hand wash them, roll them in a towel and walk on them to remove excess water and they were dry overnight!! I had brought another brand of wool underwear that are thicker they were comfy but grannie panties and would take 2 days to dry in the humidity. Love these and buying more. I hope they come in more colors soon. I’m 5’2” 124 lbs and the medium was perfect.
I LOVE the coverage for myselfbut feel the need to tell others that these come very high at the waist—kind of a “granny panty.”They are very
Soft and super breathable. I love them.
So soft
Cute cut, comfy waistband but leg openings are not flexible and that makes it less comfortable. Bummer cuz otherwise I love it!
These underwear are fantastic. You do not feel them at all. I followed the advice of another reviewer who sized up to avoid panty lines and this worked great for me. I am in the medium range and purchased a large. I will be ordering more and I hope that they are consistent with this pair!
The fabric is the real highlight here. It’s incredibly soft, almost silky to the touch — hard to believe this is wool. No itchiness, no stiffness, just a very comfortable, natural feel against the skin.
The fit is equally impressive. It stays in place, doesn’t ride up, and feels supportive without being restrictive.
Also worth noting — merino wool does exactly what it’s supposed to do: it breathes well and handles moisture far better than typical synthetic or cotton options.
Fits well, nice quality and great price. I love wool underwear, but they are quite an investment. I love how lightweight and thin it is—it’s thinner than Wooly styles I’ve bought before. It’s incredibly comfortable; when I wear it, I almost forget it’s there. You can really tell that the wool in this one is finer than other brands’. I’ll definitely be buying this again and again, and I hope they release more color options.
Barely there thanks to the thinness of the fabric. Fit is true to the measurements. Although I am usually a medium, I sized up to L and get no pantry lines. The waist elastic lies perfectly smooth. Bikinis wash well, but need to air dry, preferably flat.
I have been transitioning to natural fibers and merino wool has become my fabric of choice for underwear. Merino wool is breathable, regulate temperature and manages moisture.I love the underwear, just not the price.
Quality: Excellent quality.
I loved them when I first took them out of the package. They were soft and had just the right about of stretch to them.After washing them twice (using cold water on the gentle cycle and laying them flat to dry), they didn’t shrink at all. They feel even more comfortable now than they did the first time I wore them.
They are comfortable to wear under baggy jeans and fits like second skin. I like how good quality of material is.
These wool underwear are a little thinner than other brands.When you wear it, it’s barely noticeable, you just feel comfortable. I really like this fabric and hope there will be more styles available to purchase.
The cut it’s the weirdest thing I’ve ever experienced. Leg holes are super tiny but waist is too lose for me. So it moves down all the time. I think it’s too restrictive for me due to the tiny leg holes. Additionally to that the gusset is too wide so it’s bunching up and I have the feeling I need to adjust it non stop.
When I first tried these on these things were not as noticeable. I thought about the leg holes being tighter as usual but since wool is usually very good in adjusting to the body I did not put too much thought into it. Especially soince most wool underwear is slightly growing. Not with these. This review is after wearing and washing a couple times.
Thank you for taking the time to share such detailed feedback. We’re sorry to hear this style didn’t work well for your body shape. Fit and comfort can feel very different depending on individual proportions, and we understand how frustrating that can be.
Our designs aim to balance structure and comfort with Merino wool fabrics, but feedback like yours about the leg openings, waist fit, and gusset construction is very valuable for us. We’re continuously reviewing customer input as we refine future designs.
Our customer service team has also reached out to you to help review and assist with your order. Please feel free to check your email when you have a moment.
I love these wool underwear. I don't think I'll ever go back to cotton. I've had them for several months and they have held up well to lots of use and lots of washing. These keep me cool in the summer and warm in the winter without sacrificing breathability.
Wool underwear that wicks away sweat and moisture keeping you dry and comfortable. These are awesome.
