I think its more the pattern that breaks up your form and makes it harder to be seen versus solid colors. I've seen a lot of hunting gear in Realtree Blaze, where its the standard realtree pattern in day glo orange. I'm assuming that this would break up your form to critters that see in shades of grey, but still make you visible to other hunters. It could also be for fashion, as most realtree clothing seems to be.