Apparelsales Mens Underwear Workout Fitness Compression Shorts Briefs Boxer Trunks chinlon Material:90% chinlon/10% spndex,product style:mens sport clothing Breathable,absorbent,quick dry,it is better to wash by cold Water and hand Wash Small: Waist(26"-30"),Medium: Waist(30"-34"),Large: Waist(34"-38") It fits for cycling,yoga,swiming,running,sleep lounge It is better you tell me your body size to hep you choose right size