The comet is built to give your dog maximum pleasure retrieves. More than 1,000,000 light years away from us, far away in the universe is this comet caused to your dog to give maximum Fetching fun. The Comets Dog Swift Tuttle jumps perfectly and because of its rough structure, it keeps the teeth clean and massages the gums of your dog. The result: sparkling white teeth! Just as sparkling as the Swift Tuttle comet itself! The durable ball is made of 100% natural rubber. The Comets Dog Swift Tuttle is specially made for dogs that can not get sick from retrieving.