The Footballs are extremely durable, bounce wildly and float! Solid, natural rubber footballs for incredible durability and unpredictable bounce. These durable footballs help control destructive chewing and encourage extended play. Purple footballs float and are great for regular chewers, while the Black footballs are extra tough for extreme chewers. Features our patented Treat Trapper", which firmly grips and holds a variety of treats, gradually releasing them as your dog chews. Chew strength: Purple- Strong Black- Extra Strong: Only available in Large