U-V-Killer blocks ultraviolet reflection and luminescence. For all fabric, camouflage, and blaze orange. One bottle will treat two sets of hunting clothes. Features absorbs U-V wavelengths and thereby eliminates the blue glow caused by fabric dyes and detergents that contain U-V brighteners; eliminates the brighteners from your camouflage making your camouflage almost invisible to the keen eyes of deer and other game.