Innovative disc that bounces and floats like a tennis ball, but also rolls on the ground with the greatest of ease so your dog can chase it and fetch it back. Rubber wheel for dogs bounces and floats for unlimited, creative exercise for your dog and you. Roll wheel to unleash your dog's chasing and herding action. Open interior makes pick-up easy for dogs of all sizes. Durable rubber outside is easy on your pet's mouth. Inside is bright, tough canvas-style nylon with double-sewn seams. Foam core ensures added buoyancy. Satisfies a dog's instincts to chase and herd.