The number one selling male sex toy in the world! Every man knows the only way to get better is to practice. The Endurance Jack from Fleshlight was engineered with that purpose in mind - to turn ordinary masturbation into an intensely pleasurable training session. If you can last 10 minutes in the Endurance Jack, you can last 20 in bed with anyone. Recommended cleaning products are hot water and Fleshcare Wash. Only water based lubricants are safe for use with Fleshlight products.