It is made of quality Silicone+Pu, soft and comfortable, absorbent quickly, reusable and washable, not easy to deform. These balls can be used in many places,such as swimming pool, Parent-child interraction, sprinklers for trampolines, at waterparks, the beach, inflatable pools, or just in the backyard with a hose or kiddie pool, it also can be use as toys for pet dogs and cats. It is also perfect way for the whole family and groups to enjoy fun in summer outside games. 2.75" Diameter.