Amp up your pumping session to maximum levels of comfort with the Universal Silicone Pump Sleeve. This protective and pleasurable sleeve makes your pumping pressure more pleasurable than ever while maintaining that airtight seal you need to get the most growth out of your sessions.Penis pumps use an airtight seal and hand pump to create suction around your penis. This results in increased pressure and blood flow to your penis. In the short term, this means rock-hard erections that'll increase your confidence and drive your partners wild. In the long term, pumps encourage growth in both length and width to transform your bedroom experiences.With our donut sleeve, you no longer have to endure uncomfortable suction to help your penis reach its full potential. This super soft sleeve fits pump cylinders up to three inches or eight centimeters in diameter, so stretch it over your favorite device's cylinder for comfort and pleasure like never before.This pure silicone sleeve keeps your manhood comfortable and protected while you pump for a more relaxing and pleasurable experience. It's body safe and unscented for total peace of mind. Premium silicone pairs with an incredibly durable 2.25-inch by 2.5-inch size to create a pump sleeve that stretches to fit your needs.