Practice makes perfect and this is precisely what this Edging Trainer is for. It helps you to delay ejaculation through training. This masturbator is ideal for a mind-blowing solo-experience but it can also be used during sex. The interior of the flexible sides are designed with stimulated studs which fit the shaft of the penis snugly. The Edging Trainer is 100% waterproof and can be used under the shower or in the bath. Afterwards, you can recharge it via a USB cable. It is easy to clean with toy cleaner and lukewarm water.