I have a pair of 302's they are great, at 15 or so, less than that they will start to chill, but if you put in a pair of toasty feet insoles in them(wal mart) you can go on down to -0,in the rain they do fine,but i don't think you can put them directly under,like a creek crossing or the like,They are holding up very well so far,i would recommend them ,even tho pricey!!