A muzzle formed of a flexible sheet has a top, a bottom, and laterally spaced sides. A central hole in the muzzle is equally spaced from the sides, closer to the bottom than to the top. Two laterally spaced side holes are in the muzzle between the central hole and the sides. A restraint in a generally rectangular configuration has opposed free ends. Fasteners are secured to the restraint adjacent to the free ends. Attachment elements couple the muzzle and the restraint.
