Is made from a propriety Bionic Rubber material which is 100% recyclable, FDA approved and dishwasher safe. The amazing Bionic Ball has various bounce modes. Bounce along the spine of the ball and it will bounce normally. Then bounce it on the aperture it will create an unpredictable bounce which will keep your dog anticipating every move! You can also fill with your dogs favourite treats or food to make play even more exciting. Floats in the water too! So along with all these great benefits its also as 'tough as old boots' and makes a fantastic chew toy. The Bionic Ball gives hours of super fun! Available in Small, Medium, Large & Extra Large sizes.