This is Made of Top-quality Silicon, Not Easy to Tear. It is Washable & Can be Use Frequently & Comfortably. the Strength Trainer is Ergonomically Designed & Fits Well for All Hand Sizes, Which Perfect for Men, Ladies, Seniors & Teens. It is Great to Fit into Your Gym Bag or Handbag. You Can Get Repetitions in While Commuting, Home or Gym, at the Office or Anywhere! the Total Finger Strengthening Workout for All Fitness Levels, From Beginner to Advanced.