Made of extra-tough nylon for powerful chewers weighing over 50 pounds, the Power Chew DuraChew Big Chew Knot Bone chew toy is virtually indestructible! This durable toy helps encourage positive chewing habits, and the bristles raised during chewing clean teeth and help control plaque and tartar buildup. Chicken Flavoured For Dogs over 50 lbs (23 Kg)