Heavy Duty - Extra tough reinforced Z-Stitch technology is exclusive to Zippy Paws. Grunterz toys are perfect for aggressive chewers. Exclusive Noisemakers - This fun prehistoric friend comes filled with one grunter squeaker for loud noisemaking to keep your best friend entertained for hours. Super Durable - Each Z-Stitch toy is fortified with extra layers of durable fabric to prevent ripping and shredding. Play, tug, and toss away! Stuffing Filled - Just because this to is tough on the outside, doesn't mean it isn't soft on the inside. Tough to tug and play, and soft to snuggle. Zippypaws Quality - ZippyPaws means design and quality. At our core, we stand for only giving your dogs the best. Count on ZippyPaws for all of your dog toy needs!