The Essential Bikini seamless Merino wool underwear stays put and moves with you through every twist and turn. Seamlessly knit from super-fine 17.5-micron 81% ZQ+™ Merino wool, it keeps you dry, comfortable, and funk-free all day, whatever your adventure.
The seamless design and soft, no-dig waistband won’t roll or ride up on your hike, r
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1.2K ratings
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Comfortable fit
I was pleasantly surprised that I liked the fit. I hadn’t tried the bikini style because I wasn’t sure it would have enough coverage to feel comfortable. But I wore it all day without any issues or needing to tug it back in place. My only wish is that the material content would have a higher %of merino and the other materials were eco friendly like the merino.
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MmeAK · October 31, 2026
Bra and undies
Wow, that just about covers it. I’ve been searching for a bra that is supportive while also not feeling like I’m being squeezed in the ribs. The other night I almost forgot I was wearing it - wonderful!
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Customer · October 31, 2026
Tighter style than essential boy shorts
I love the same great fabric and high‑quality construction I’ve come to expect from this brand. I ordered the bikini in my usual size L — the same size I wear in the boy shorts — but the fit is noticeably tighter across the top band. I’m going to keep it for now to see whether it relaxes over time, since my boy shorts have stretched out and feel looser (and it’s definitely not because I lost weight).
If you’re between sizes or prefer a more relaxed fit, I’d recommend sizing up in the bikini style.