I read in the Deer HUnting Bible book, that deer are not actually looking at you, nor do they see teh difference in your camo break up, They have intense amount of cones in their eyes instead of rods, therefor causing them to have depth perception, and if your silutlet is covered it doesn' t matter the camo break up. But what the deer do notice and spook because of it is the UV light that radates from you clothes due to the detergent in your washing machine soap. They notice the light that is coming off of you and are catious becuase they are not used to seeing that. A good way to check the UV light that is coming off your clothes is to stand undernth those blue bug zappers.