The Mega Mutt Mega Chewz Roller is the ideal toy for heavy chewers. These durable chew toys are made of a high-strength polyurethane material that is designed to handle high impact. The Roller features durable nylon straps for extra tugging and tossing fun. Stuff treats inside for an added bonus. Mega Chewz tough toys are great for gnawing and chewing, and also help to relieve boredom. Ideal for medium to extra-large sized dogs.