Proguard Pets Tuffie Muzzle NEW tougher version of our award winning Proguard series of muzzles, the Tuffie will give extra protection against frontal dog bites. Thick padded protection specifically designed for the front that is cushion for both dog and handler. Works great for medium to mildly aggressive dogs. This unique design allows for the animal to open their mouth to breathe normally while still feeling comfortable and is superior to standard coffee cup muzzles.