KINGDESON Men's Beach Sexy Back Pocket Lace-up Swimming Trunk Underwear Navyblue 80% nylon comfortable and breathable,with 80% Nylon &20% spandex Hang or lay flat to dry, quick drying Pocket on the back,with strips front, easy to resize Size S: Waist 25-28 inches;Size M: Waist 27-30 inches;Size L: Waist 29-32 inches;Size XL: Waist 30-34 inches Hand wash in the cold water