Medium Kong Air Dog Interactive Tennis Fetch Toy, ideal for retriever training, both on land and in the water. Fun, erratic bouncing design nonabrasive materials - gentle on teeth and gums Floating This item does not squeak! Highly visible yellow material ideal for gundog and retriever training Floats high on the water and comes with a high quality throw rope. Made from our nonabrasive tennis ball material which is gentle on the teeth and gums. This toy is perfect for retriever training. Medium size.