This Pro Club Boxer Trunks is made of 55% cotton/45% polyester. This is one of the men's best boxer trunks being offered and features plush-backed elastic waistband. This high quality trunk has longer inseam and features vented sewing on both sides. Size / S(28"-30"), M(32"-34"), L(36"-38"), XL(40"-42"), 2XL(44"-46"), 3XL(48"-50"), 4XL(52"-54"), 5XL(56"-58")