These are the goggles issued to military working dogs to protect their eyes from blowing sand and the sun. The glasses have shatterproof polycarbonate lenses and a rubber wrap around frame, providing a barrier to dirt and dust that can fly into a canine's eyes while peering out of a moving car's window. The lenses block 100% of the sun's harmful UV rays and will not fog up in cool weather. The goggles are specially designed with a deep lens cup and a wide bridge to accommodate dogs' protruding eyes and wide snouts. The frame is lined with soft foam padding and the elastic head- and chin-straps adjust to ensure a perfect fit. Sizes are determined by dog's weight. Specify S (9-25 lbs.), M (20-60 lbs.), L (50-100 lbs.)