Our classic, go-to boxer brief built with a super-soft, stretchy and highly durable merino wool blend, and outfitted with the support and comfort you need for both daily life and weekend adventures, the Anatomica Boxers with Fly are the underwear you've been searching for. With an exclusive Icebreaker fit that makes them the most comfortable pair in your underwear drawer, the Anatomica Boxers with Fly also feature our corespun fabric, merino wool fibers wrapped around a nylon core, for increased durability and strength while retaining next-to-skin softness. Flatlock seams eliminate chafing when you're on the move, and the contoured pouch with a functioning fly offers support and function. FABRIC WEIGHT: 150 Ultralight FABRIC: 83% Merino Wool, 12% Nylon, 5% LYCRAA(R)