The Performance Replacement TPE Pump Sleeve is made from the same material as Blush Novelties' X5 Dildos and Masturbators. Soft and stretchy as well as durable. This sleeve holds a tight seal when your penis is inserted in the pump cylinder. The soft material feels comfortable when sliding over your penis, and it is made from body safe phthalate free TPE. Buy only Performance brand pump accessories for your Performance pump.