They are OK. Won't keep you toastie all by themselves and your stink is up to you. Truthfully, mine have an odor to them when I take them off. I wear scent lok outer wear, but I do wear my favorite wool hunting jacket over them when I get too cold.A scent lok head covering works very well. They are not too expensive. Get a couple. Had mine on and had mine off. Almost like night and day. One minute their eating and the next their staring right at me.