We think this is probably the WORLD’S TOUGHEST stuffed squeaky dog toy. Except when it isn’t. Some dogs never chew through it. Some are able to gnaw through the sewn corners. Which kind of dog do you have? Grrrsack is made of the same fabric as our Ursack AllMitey BEAR RESISTANT bag–a patent pending laminated combination of Spectra and Kevlar correctional fabric. Stuffed with white polyester fiber fill and a 1 3/4″ squeaker, Grrrsack will give your dog hours of pleasure. Our dog–a 55 pound Portugese Water Dog–has had her Grrrsack for two years and it is still intact. While we offer lifetime warranties on our bear bags, we do not on the Grrrsack. Dogs have sharp teeth and strong jaws. Bear teeth are dull.