The Mega Mutt Mega Chewz Bone 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. Use a spreadable treat, like peanut butter, in the grooves to make playtime even more fun. Mega Chewz tough toys are perfect for gnawing and chewing, and also help to relieve boredom.