What you put on first can set the tone for your entire workout. That's why it's important to have underwear that feels like it was designed just for you. The Smartwool Men's Intraknit Boxer Brief has a slim fit that moves exactly with your body, minimal seams to help prevent chafing, and a soft fabric that helps manage moisture while keeping you cool. So even on the sweatiest workout, you can focus on only what's important: amping that intensity to where you want it. FeaturesSlim fit is intended to follow the contours of the bodyFabric helps combine the moisture management, temperature regulation, and odor resistance of Merino with TENCEL Lyocell fiber to help keep you coolMinimal seams designed to help reduce chafing and help you to work out distraction-freeSeamlessly knit mesh ventilationWorks with a body in motion and helps provide a supportive fit for performance and trainingInseam: 6" (15 cm)53% Merino Wool, 20% Polyester, 18% TENCEL Lyocell, 8% Elastane, 1% Nylon.