The Cock Cage performs the same basic function as a penis ring, but is wider and more robust. The sleeve is stretchy, has a ribbed texture to stimulate your partner even more, and your penis will be snug inside the sleeve that fits snugly. The sleeve is made of TPE with Doc's Sil-A-Gel antibacterial formula, phthalate-free and body-safe. It is recommended to never wear the sleeve for more than 20 minutes at a time.