evo.com | Smartwool Long Underwear Bottoms > The Smartwool Classic All-Season Merino 3/4 Bottoms are built for the sweet spot between seasons. Lightweight, breathable, and made with 100% Merino next to skin, they add just the right amount of warmth without getting in the way. Perfect for ski boots, trail days, and every adventure where full-length layers feel like too much. Fully Functional Fly 88% Merino Wool / 12% Recycled Nylon Medium Inseam 21.5" Slim Fit Smartwool's slim fit is intended to follow the contours of the body. Flatlock Seam Construction | Smartwool Classic All-Season Base Layer 3/4 Bottoms Men's 2027 - Medium Black | Nylon/Wool