The wide waistband, a staple of the old school jock, has been improved. Jack Adams made it a full 2.5 inches and included a softness missing from the jock straps of the past. Even the rear straps have been widened giving greater support along with a nice lift. Together, the wide waistband and rear straps provide a snug fit and durability needed for a hard workout on or off the field. Made from 70% Polyester, 15% Cotton and 15% Rubber. From Jack Adams old school jock strap fits men size medium. Waist 30 inches to 32 inches.