M2M Ring Silicone Mega Black. The role of a cock ring is to provide constriction, this constriction slows the flow of blood from the erect penis creating an erection that not only lasts longer but is also thicker and harder. Because of its extreme elasticity Silicone provides the maximum constriction of any product on the market. Silicone returns back to its original shape as soon as it is removed and can be used over and over again. 100% skin safe is a great tight fit but a very versatile one too. Wash before and after each use. Always use a water based personal lubricant with this product for maximum pleasure. Important warning: this novelty product is intended as a sexual enhancing aid. Not intended for contraception/birth control or treatment of erection conditions. Use no more than 30 minutes at a time. Allow 60 minutes between additional uses. Do not fall asleep or be under the influence of alcohol or drugs while using this product. Prolonged use without removal may result in bruising to the base or permanent injury to the penis. Consult you physician should any complications should occur and discontinue use immediately.