Enjoy a pumping experience with extreme comfort and protection and add the Advanced Silicone Pump Sleeve to your favorite pump. This flexible, stretchy, and protective sleeve does away with uncomfortable suction for a totally luxurious experience. Penis pumps work by using suction to create an airtight seal around your penis. Pumping leads to increased pressure and blood flow in your penis; in the short-term, this results in erections that are harder than ever. In the long-term, pumping encourages growth in both length and width so you can impress your lovers and increase your confidence in the bedroom. These heavy-duty rings are the optimum choice for serious pumpers. This pump sleeve fits cylinders measuring up to 3 inches or 7.5 centimeters in diameter. The donut sleeve is made of premium, high-quality silicone to give you the comfortable suction experience youve been wishing for. Just slip it onto the base of your favorite devices cylinder for added comfort and protection. Pure silicone provides the ultimate stretchy and durable ring to fit a variety of cylinder sizes. This universal sleeve is body safe and unscented for your peace of mind and takes your pumping session to new levels of pleasure. The 3-inch by 1.25-inch pump sleeve is just what you need to make your pumping more satisfying and enjoyable than ever.