Found this in a magazine. Game animals see the glow of UV and short blue wavelengths of light thousands of times brighter than humans.To explain it, deer can see clothing that has been washed with a color brightening detergent almost as if they were a pair of headlamps heading towards them. I have never had any problems with this in the woods. I hang my shirt and camo pants out on the line for a day or two before i go hunting.That's a must do for me. Rain or shine. The sent of human must be gone to go hunting in the woods where human sent is not present.