Snap Off Pouch and Rear Zipper Find your fetish in these rockin’ looks by CellBlock 13. The All Access collection by CellBlock 13 features a rear zipper brief, sexy jockstrap and exposing jock briefs made with a wide logo waistband, a soft and stretchy polyester/spandex fabric and a with snap on/off pouch. Formfitting, frisky, and fashionable, these hardcore looks will be snatched up instantly. Grab your favorites now — or cry like a baby later.