The lightweight stretch fabric keeps you cool and moves with you to keep you comfortable, fresh and dry all day long. These trunks feature a Smooth Comfort waistband and roomy design where you need it most. Strategically designed to meet your active work and lifestyle performance needs. Cotton Blend to keep you cool and dry. Soft stretch fabric that moves with you for all-day comfort. Smooth Comfort Waistband. 95% Cotton 5% Elastane.