Ken, ASAT is a patern. It fools or confuses the eye. I have had my buddy look at me in an open field of dried grass and he couldn't see me, same as in trees and brush. Works for me! The single biggest problem is that camo is made for the human eye (to sell to) and some hunters looking at is cannot believe it works. The guarrantee? well donno what to say other than that I don't think you will be sending it back.