Jaxu Men's Modal Bikini Briefs Underwear 5% spandex 95% Modal+5% Spandex Machine wash in soft cycle or hand wash. Do not use chlorine bleach.Do not iron. Modal fabric,solid pattern Pouch bikini,mini briefs back design M(Fit Waistline 27.6"~31.9")/L(Fit Waistline 29.1"~33.8")/XL(Fit Waistline 30.7"~36.2")