Updating a classic pelvic floor (and orgasm, tangentially!) strengthening system in fresh, fun and completely customizable style, OVO's L1 Love Balls are all set to re-vamp your sexy work out. Here's how it works: 2 of your choice of 4 included jiggly weighted ovals (two in violet and two in silvery metallic plastic) slip securely in a silicone cradle. Once gently pushed into place inside your or your vagina-owning partner's body, the subtle weightiness requires flexing of the pelvic floor muscles to keep them in. That flex effect tones and strengthens muscles over time, making for a tighter grip and more pelvic control overall.Beginners can start with just one ball in the cradle (they pop out easily), moving up to both when ready. Experts can even use the balls without the cradle- holding onto the smaller size of a single sphere takes more control. Tonging and tightening aside, the L1 Love Balls feel great inside, they bounce and roll along with movement for a deeply stimulating effect plus more awareness of your vagina and it's sensuality potential. Some women swear by wearing their kegel balls to warm up pre-playtime. Fun fact: they can have a lubricating effect, too!Smooth high end silicone (cradle) and firm ABS plastic (balls) clean easily and thoroughly using warm soapy water or a good toy care fluid/foam. Compatible with any favorite high quality water based lube, please avoid contact with silicone lubes and products.* The L1 set weighs 3oz (85 grams) with the violet balls in place and 3.67oz (104 grams) with the silver balls in place. It's 3.35oz (95 grams) with one of each ball. It's about 8.5" (21.6cm) in total length, 3.25" (8.26cm) insertable and about 1.4" (3.6cm) in diameter.