Optimale Endurance Trainer ULTRASKYN Stroker. Designed for men looking to increase stamina in the face of intense stimulation, Optimale’s Endurance Trainer Stroker combines an intensely textured inner sleeve with customizable casing engineered to test longevity limits.

Deeply grooved, the Trainer’s texture provides lots of over-the-top sensation made even more extreme by squeezing the shell. To improve stamina, start by noting how long you can last during self-pleasure, and work toward increasing that time. A twist cap at the base of travel-friendly discreet casing controls suction for an added challenge.

In Doc’s patented ULTRASKYN, the Trainer’s elastomer/PVC sleeve construction is body-safe and free of irritating phthalates. Remove sleeve from casing to rinse well under warm soapy water or use a good toy care fluid/foam to clean before and after use. Allow to dry thoroughly before storage. Most compatible with water based lubricants.

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