I brought a set of these overalls from screwfix when I was supporting a rally car as a technician. I used them in wet -2 conditions wearing boxers and a tshirt they kept me super warm and comfortable. I have used them in the snow and had the same results. I can't tell you how good they are. Once I try them you won't look back in cold wet conditions there perfect. U could sleep in them with no sleeping bag and u would be ok. I slept in them in -2 in a covered pit area. Exposed to wind and was totally comfortable.