Designed and tested with the toughest chewers in mind, the ZippyTuff+ Lightning Bolt is one of our toughest toys yet! Made with an even more durable TPR, this toy is perfect for dogs who take their chewing game seriously. The ZippyTuff+ Lightning Bolt has a faceted gem-like design that is extremely satisfying to chew. And because it's made from the more durable ZippyTuff+ material, it can withstand hours of chewing and chewing.