I wear wool clothes or military surplus items (BDUs, etc) with an ASAT leafy suit on top of that, fits right over my clothes with ease and doesn't get in the way or feel uncomfortable to wear.
I've been busted crawling on hands-and-knees (trying to sneak up on some bedded down does) in broad daylight by a buck; glanced at me, walked off. I've sat down in front of dark green cedar trees (ASAT has a tan base color) with no cover in front of me and had deer feed in front of me within 30 yards for 20+ minutes, then turn and walk right past me.
I will say that the synthetic (polyester I believe) material the suit is made from is a bit too bright during the 'magic hour' as the sun is going down. During that time of day, I've had multiple deer walk up on me and get startled, as if I stood out to them. To my eye, I appear to stand out more as well, so my last hunt I took off the suit when the sun started to go down (didn't see anything, so 'need more data', heh).