Atsko Zero UV Killer Spray 18 oz.. 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. Package Contents: Atsko Zero UV Killer Spray Zero residue hypo-allergenic formula. 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.