Metal Ben Wa Balls For WomenHIGHLIGHTS Made of medical grade ABS material food grade silicone material. Safest, most comfortable & most effective pelvic floor exercise program. Strengthens pelvic floor muscles, improves bladder control, and improves overall pelvic health. Balls of different weights and staged training can achieve a gradual effect. 100% waterproof design Can be played in the bathroom, easy to clean. BENEFITS FROM TRAINING PELVIC FLOOR MUSCLES Cure urinary stress