The Fleshlight STU™ (Stamina Training Unit) masturbator is a sex toy for men and the closest thing to the feeling of real penetration. The Fleshlight STU helps men to find the right rhythm and to obtain peak sexual performance. Because the Stamina Training Unit is tighter and the sleeve has more studding, the masturbator is the perfect training tool. With its patented Real Feel Super Skin® masturbation sleeve and its specially designed internal texture, the STU offers the most intense and pleasurable training experience. Masturbating with the Fleshlight STU, doesn't just improve your sexual stamina and techniques - you will also experience the most intense orgasms possible which can only be achieved using the Fleshlight toys for men. If you can last 10 minutes in the STU, you can last 20 minutes with your bed partner. The Fleshlight STU comes with an exclusive Gold Fleshlight Case. Before using the Fleshlight STU it is recommended to immerse the sleeve in warm water. This way, the sleeve warms up, which makes for an even more realistic experience. A warm Fleshlight feels much better than a cold one.