Designed for the most demanding use, the Chuckit Medium Chuckit Ultra Ball is not your dog's ordinary ball. Simply put, this is the best ball for the game of fetch. Developed to have high bounce, high buoyancy, high visibility and high durability, the Chuckit Ultra Ball promises to outplay the ordinary. Featuring an extra-thick rubber core and quality material that floats, the Ultra Ball can be used in the water and is designed specifically for the game of fetch. Its bright color gives the Ultra Ball increased visibility and helps prevent it from getting lost.