Ergonomically designed to make it easier for dogs to grasp and chew, the Nosh Wishbone is made of tough, durable nylon that satisfies a dog's natural chewing instinct while providing long lasting enjoyment. It's strong enough to withstand even the most enthusiastic of chewers and, with 3 ends to gnaw on and a textured surface, it will keep your dog engaged and challenged with the added benefits of exercising jaw muscles and helping to maintain oral hygiene. Made from 100% nylon Ergonomic Wishbone shape For active chewers Satisfies natural chewing instinct Helps prevent boredom and destructive chewing Safe and durable Long lasting Available Sizes: Small 11cm (4.5") Medium 15cm (6") Large 18.5cm (7.5")