CFF FCC Mens Summer Beach Swimming Lace-up Briefs Trunks Sports Underwear Material:82% Nylon,18% Polyurethane. Size For The trunks:Size (M) Waist = 76-84cm Size (L) Waist = 80-88cm Size (XL) Waist = 84-92cm Size (XXL) Waist =88-96cm Wear comfortable and breathable. Made of soft material let you feel well. DUE TO ASIAN SIZE.Please choose ONE SIZE UP than you normally wear.