The Nerf Dog ultra tough TPR rings will entertain you and your dog for hours on end! Play "tug of war" with your best friend, or let him play tug with other dogs. Great for tugging, extended chewing, toss and retrieve, and playing in the pool! Super Strong: The durable rubber body stands up to extended chewing. Interactive: one of a kind design makes tug-of-war easy. Waterproof: take it to the beach, pool, or lake!