It is made of top-quality Silicone, not easy to tear. It is washable and can be use frequently and comfortably. The strength trainer is ergonomically designed and fits well for all hand sizes, which perfect for men, women, seniors and teens. It is great to fit into your gym bag or handbag. The total finger strengthening workout for all fitness levels, from beginner to advanced, home or gym. Portable and popular equipment makes a great gift.