The Gor Flex range is made using TPR (thermoplastic rubber) which offers a superb combination of rubber and plastic to give a very tough and flexible toy. The Squeak & Treat Ball has an encased squeaker which means even if the toy is pierced it still continues to squeak. It also has a groove around the ball to insert small treats. It squeaks and has treats, making this the ultimate dog toy. The Flex material ensures long lasting funtime for your dog.