Barsty Men's Sexy Briefs Brief Underwear Set Material:Nylon Widen the elastic belf,stitch close,fashion printing design. Good affinity to skin, breathable moisture, not out of shape. Asian size M/US S : Waistline(28"-30'' stretch ) Asian size L/US M : Waistline(30"-32'' stretch ) Asian size XL/US L. :Waistline(32"-34'' stretch ) Hand or machine wash,cold water,no bleach,tumble dry low.