SAFE AND STURDY MATERIAL: You can be 100% reassured that this rope toy is made of tight, multicolored nature washable cotton ropes, perfect for tug, chewing, and shaking. This toy will bring your dogs hours and hours of entertainment and exercise.HEAVY DUTY ROPE TOYS FOR LARGE DOG: 3 feet long, 5 knots and 750 gram weight. If your dog is an aggressive chewer, this is the best choice. The toys nearly indestructible, it is stronger and more durable than same type of rope toys.