The MARROW BONE™ by Sporn is the chewable nylon bone with 'Jerky Down the Middle'!Marrow Bones™ for dogs are durable and will provide hours of enjoyment and chewing satisfaction. These Marrow Bones are made of 100% Chewable Nylon. Nylon shavings from the Marrow Bone act like a toothbrush and help remove tartar from the dog's teeth
