Yea I know hats will stink it up, I have a few, and after a few trips to the lake fishing, they get rank, or a black hat will accumlate a salt line from your sweat. Tonight I was able to stalk some deer, got about 40 yrds from them, no good shots. All were smaller does. Washed everything before I went, even the hat. I guess Ill try it hat-less, it really does trap alot of sweat. Other than that, is there anything else detamental to my sucess? I think I have an alright scent prevention system.