Jaxu Men's Elastic Thong Spandex T-Back Underwear 80% Polyamid + 20% Elastine Machine wash in soft cycle or hand wash. Do not use chlorine bleach.Do not iron. Elastic spandex fabric,soft,stretchy,dry fit,solid Pouch bikini,T-Back,thong design M(Fit Waistline 28"~32.3")/L(Fit Waistline 29.5"~34.3")/XL(Fit Waistline 31.1"~36.2")