96% Bamboo Viscose, 4% Elastane Imported Hand Wash Only Best suited for guys with thinner legs 3D Comfort Pouch - A hidden piece of elastic around the pouch to surround you perfectly and keep everything in place UltraGlyde - Ride up resistant panels prevent leg ride Super Soft Bamboo Viscose - Wicks away moisture, produced in a close-loop system THICKER LEGS: Our Bamboo Boxer is suitable for thicker legs. Step One bamboo underwear for men, in boxer short and trunk styles. Featuring a 3D Comfort Pouch - A hidden piece of elastic around the pouch to surround you perfectly and keep everything in place providing the ultimate in comfortable underwear all day long. UltraGlyde - Ride up resistant panels prevent leg ride and prevents chafing. Made from Super Soft Bamboo Viscose - Wicks away moisture, certified and produced in a close-loop system. 96% Bamboo Viscose, 4% Elastane.