Jack Adams Rugby Jockstrap 3.0. With a contoured male jock pouch made from best-selling Bodyflex mesh fabric, this new Jack Adams 3" wide band jocks are athletic, supportive and very sexy. The pouch is trimmed in contrast color cotton for comfort. These mesh jock straps are part of Jack Adams latest collection with a new and improved fit and a softer feel. Made from 95% Polyester and 5% Rubber. X Large. Waist: 36"-38".