Oliver & Iris Durable Knot Rope Dog Toy Ball for Large Dogs Durability at it's finest: When you want the most durable dog toy on the market, this rope ball is exactly what you need. Suitable for dog training, for tug-war or fetching. You can use it even if you have one of the strongest dog around High End Quality Dog Toy: Oliver & Iris rope tug toy is made upon the highest standards and is constructed to exceed the highest expectations Best Rope for aggressive chewers: Let your dog play alone without worrying. The construction is designed to eventually allow dogs to unwind the product but will take months to complete 100% Safe for your pets: Oliver & Iris premium quality dog rope is made only from cotton. There are no added toxics or plastics that could jeopardize your best friend's health and hurt his teeth or mouth Designed for very aggressive chewers