I just started using scent lok this year (pants and Jacket only). This AM (before light) I spooked some deer from under the stand and the wheezed but hung around the area. They wern't down wind at the time so I don't think they smelled me. They did however circle down wind (20 mph strong wind) and continued to wheeze and ran off eventually. So I don't know if they could smell me all that well or were just spooked from the get go. Later in the AM three doe came in at 20 yards straight down wind of me and bedded down. They never acted nervous. So I guess maybe it helped. By the way, I keep myself and hunting cloths scent free and don't dress until I get to the field. That I think is key, but the scent lok I think helps also. Hope this helps.