Rubber Material: Dog hollow ball is made of premium rubber material, high resilience, can chew without worry, not easy to hurt the pet teeth. Flexible And Interesting: Dog rubber hollow ball, flexible in use, the interior can put small toys, such as bells, more attractive to pets to play. Bite Resistant: Pet rubber ball toy is firm with high toughness, long tearing and biting without deformation, for long term pet play. Interactive: You can also interact with your pet to play, throw the ball, and then let the pet pick it up, to better accompany your pet and help promote relationship. Lightweight And Portable: Dog chewing ball toy, can be used for grinding teeth. Small and light, easy to carry, convenient to your pet in the outdoors.