★ Made of medical-grade silicone material, which is non-toxic, tasteless, safe and soft, skin-friendly, and reliable.
★ Internal Structure- Rolling metal balls, inside each kegel exerciser, provides biofeedback as you move.
★ You can use it as a beginner workout to build up weightier models and stay strong and tight, strengthening pelvic floor muscles to keep you healthy.
★ These balls can be used everywhere and during daily lives as your shopping, walking, running or working
★ Waterproof. It can be used in the shower, bathroom, swimming pool, kitchen, etc.