Atsko U-V Killer Spray 2 qt.. Works on all fabrics. Eliminates brighteners from your clothing making your camouflage almost invisible to the keen eyes of deer and other game. Package Contents: Atsko U-V Killer Spray Blocks ultraviolet reflection and luminescence. Works on all fabrics. Eliminates brighteners from your clothing making your camouflage almost invisible to the keen eyes of deer and other game.