Duke's sliding shorts and built-in cup supporter combine the benefits of compression shorts, a jockstrap and a hard cup. Included is Duke's 2N1 cup. This ingenious design provides a soft, rubbery inner cup with a removable hard outer shell. Snap them together for the protection of a hard cup, or remove the hard shell and wear just the soft cup.These shorts combine the benefits of compression shorts, a jockstrap and a hard cup. They have a rugged body construction of 83% nylon and 18% spandex for firm compression and comfort. The built-in jockstrap offers a cup pouch and deluxe polyester heat-resistant leg straps. Thigh pockets hold removable non-woven polyester felt inserts for thigh protection and energizing support to leg muscles, lower abdominals and buttocks. Comfortable and functional.