Our Tuff Ball Tugs are made with 100% premium cotton rope and our industry leading Tuff Ball®. Tuff Ball tugs are great for a game of tug-of-war or fetch. Rope toys help keep your dog's teeth and gums clean and healthy. Unlike humans, dogs only have two cones in their eyes, causing them to see a limited pallet of colors. Blue is the darkest color they can see and yellow is the lightest. By making our toys blue and yellow, your dog sees great contrast and can find them easier.