These smart balls make it possible to train your pelvic floor muscles in a playful and fun way. During everyday activities, the Smartball Uno trains the sensitivity of the inner muscles, strengthening the pelvic floor muscle. With just one ball, Smartball Uno is fantastic for beginners and for women with a prolapsed or tipped uterus to get their pelvic muscles back in shape in a fun and easy way. Muscles that are back in shape promise more sensation during sex. An ergonomically shaped finger hollow makes insertion easy and a woman can go about her day without interruption while at the same time be training diligently. The new Smartball design includes a conically tapered ball to ease insertion and an almost completely silent steady and intense rolling motion of the inner balls. Smartballs are hypoallergenic, gentle to the body and include a flexible silicone retrieval band. Always use a water-based lube with Smartball.