i go with a really heavy wool coat but wear i hunt im sumtimes lookin at temps down to 20 below 0 but even on warmer days i dont have much of a problem. as far as the pants go i wear a lot lighter wool mostly just to keep the snow off of me and keep me dry. then under my wool pants i usually wear a pair long underwear and a pair of jeans seems to be sufficient. my uncle likes to wear a pair of sweats under his wool pants instead of jeans you might find that more comfortable.