The Rhino Skin Foam Bowling Ball is designed for safety and durability. Made with Rhino Skin, a durable polyurethane foam with a tough outer coating, this 1.5 lb. foam ball is great for indoor or outdoor use. It features two sets of 3-finger hole configurations and is weighted for easy grip and roll. Rhino Skin foam is easy to clean and disinfect and ideal for any age group! Playing a soft game of bowling indoors or out is a great way to teach bowling basics as well as a fun lawn game activity!