YKC Jinshi Men's Underwear Bamboo Boxer Briefs Short Leg Material:95 % Bamboo Fiber +5% Lycra Spandex Imported Bamboo Fiber Feature:breathable,lightweight,supportive,soft,dries quickly Tagless design eliminates annoying tag itch.Dries quickly if you do sweat in them Leg cut is just short enough to keep material from riding and bunching Waist Measurement:US S(25"-27");US M(28"-30");US L(31"-33");US XL(34"-36");US XXL(37"-39") We strongly recommend ordering ONE size up what you normally wear