These double Kegel balls are made of soft and flexible silicone, perfect for performing the exercises comfortably and easily. Inside each ball, you will find smaller, firmer balls that move with each step. This helps the muscles contract more effectively and allows you to enjoy the vibrations created by these smaller balls. Each ball has a floral pattern and a flexible silicone ring for easy and convenient removal after exercises. They are completely waterproof, so try them in the shower! Don't forget to clean the toy properly with a toy cleaner (F-843) and water, then dry it thoroughly to maximize its lifespan. Use your favorite water-based lubricant for an extra wet experience. Features: Pelvic floor exercises, Silicone, Waterproof, Weight: 70 g, Length including cable: 145 mm