Apparelsales Mens Summer Spring Running Cotton Brief Sport Underwear Boxer Shorts Material:Cotton,70% cotton/30% polyester,product style:mens sport clothing Breathable,absorbent,quick dry,it is better to wash by cold Water and hand Wash Small:Medium: Waist(30"-34"),Large: Waist(34"-38"),X-large: Waist(38"-40") It fits for cycling,yoga,swiming,running,sleep lounge It is better you tell me your body size to hep you choose right size