You're viewing
Boxer Brief
Suits thicker legs. 3D comfort pouch.
Size
Print Poseidons
It's time to rule your day with Poseidons - our latest pair of limited edition blue and green bamboo underwear from Step One. Our underwear offer superior moisture-wicking and anti-chafe protection - these boxer briefs are fit for a king of the seas.
We aim to ship your order 1-2 business days after you place it.
Free shipping, no minimum spend.
Estimated delivery once shipped: Western USA about 2-4 days, Central USA about 3-5 days, Eastern USA about 4-6 days, Alaska and Hawaii about 5-8 days.
We're so confident you'll love your Step Ones that if you don't like your first pair for whatever reason, we'll give you a full refund within 30 days.
Size chart
On a line or between sizes? Size up. Tap a row to select that size.
We didn't just make underwear. We reinvented it.
Friction-resistant panels prevents chafing and ride-up, ensuring all-day comfort for your thighs. No more adjusting.
Anatomically designed pouch keeps everything separated and supported, reducing friction and sweating.
Advanced sweat-wicking tech keeps you dry and comfortable, even during the hottest days or toughest workouts.
26M+ Pairs Sold
4.5 TrustScore
2M+ Happy Customers
What customers say about our Boxer Briefs.
4.7 from 20,639 reviews of this product
All made from bamboo viscose with anti-chafe Ultraglyde panels. Pick the length and fit that suits you.
You're viewing
Suits thicker legs. 3D comfort pouch.

Love them or they're free. If you don't love your first pair, we'll give you a full refund.
They are made from high-quality, organically grown Bamboo Viscose. This material is incredibly soft, breathable, and moisture-wicking, keeping you cool and dry all day long.
The Ultraglyde™ panels are friction-resistant panels on the inner thighs that prevent chafing and stop the legs from riding up. They ensure your legs glide past each other rather than rubbing.
Our 3D Comfort Pouch is anatomically designed to keep everything separated and supported. It reduces skin-on-skin contact, friction, and sweating, giving you the support you need without feeling restricted.
We're so confident you'll love your first pair of Step One underwear that if you don't, we'll give you a full refund on it, for whatever reason, within 30 days.
Machine wash cold with like colors. Tumble dry low or line dry in the shade. Do not bleach, iron, or dry clean to maintain the quality of the bamboo fabric.