1. [SAFE RUBBER MATERIAL]: Balls are made from thick rubber cores, have great elasticity, and are a soft touch for aggressive chewers. 2. [BRIGHT & VIBRANT COLOR]: Easily peaks your pets' interest. Improves the relationship between you and your pet. 3. [MORE PHYSICAL ACTIVITY]:Exercise training ball develops your pet's body and coordination, increasing intelligence and creating a happy spirit, and it is also a good way to clean their teeth and exercise their muscles.