Double stuff the Double-Tuff®. We double-dog dare you! Inspired by our extra tough Diamond Plate balls, the Double-Tuff is made from the same doggie-durable, bouncy, buoyant and mint-scented Orbee-Tuff® material. Its asymmetrical “doubled” design makes for amazingly unpredictable bounces, making it a toy that can stimulate a dog mentally much more than a standard fetch toy.