Made with tough, durable nylon, the Power Chew DuraChew Original Chew Toy was designed for your powerful chewer. It provides long-lasting enjoyment, satisfies your dog's natural urge to chew, and encourages positive chewing habits. Plus, the bristles raised during chewing promote clean teeth and help control plaque and tartar buildup. Go ahead and give your dog a Nylabone! For dogs up to 50lbs.