We chose these boots because they are light and warm. The rating on them is -65F, which of course is only a relative number, but is warmer than almost all boots. They are about half the weight of traditional pac boots. We recommend purchasing a pair of our real wool felt liners to use in these boots, but they do come with removable liners.
Construction: Rubber bottoms with good winter tread, nylon uppers and removable foam liner.