Zanies® Rope Toys are a great way to satisfy dogs' urge to chew. Natural cotton rope dyed with vegetable dye creates colorful, long-lasting toys in a variety of sizes and shapes that dogs will love. Toys are not only fun to play with, they also help keep dog's teeth and gums clean and healthy! Zanies Knotted Rope Bones are available in 3 sizes. This is our largest 3 knot rope bone.