This Puppy Chew Twin Pack has a soft, puppy-friendly Moderate Chew FlexiChew toy to satisfy teething pups and encourage positive chewing habits from a young age. It also has a tougher chew toy ready to withstand for your pup's permanent teeth when he becomes a stronger chewer. Plus, the bristles raised during chewing will help clean your pup's teeth and prevent tartar buildup. (Designed for teething puppies who do not have their permanent teeth.) Go ahead and throw your pup a Nylabone (or two)!