The crackle heads canvas cuz large toy is our iconic cuz covered in tough canvas with crackle heads technology inside. Our patent pending bottle ball is placed inside the durable fabric to provide the crackle sound and crunch that dogs love. The canvas fabric covers the bottle ball providing a protective layer that allows the crunchy sound to still come through. The bottle ball has no cap or sharp rings that can harm soft mouth areas. Crunchy and safe fun that dogs love wrapped into a classic proven top seller. Suitable for medium and large breeds.