 Specialized underwear is available which comes with pre-fitted cock rings.The underwear has a pouch with an internal fabric/elastic cock ring which either slides along the penis and encircles the scrotum or, alternatively, simply snaps around the base of the scrotum to snugly—but not in a constricting way—attach the pouch to the genitals.While this type of pouch permits the wearer to "go backless", C ring pouches can be attached to either a thong or traditional jockstrap.