Nylabones for Dogs and Puppies. The Marrow Nylabone Bone is a chewable nylon bones with a 'Jerky' flavour running down the centre, which helps motivate dogs to chew. They are extremely tough and durable. The Nylabone Adult Chew is created with pure virgin nylon. It is annealed after moulding to make sure it is safe for your dog to chew on and play with.