Miscellaneous Notes on Camping : Page 178
mat of boughs, the better the insulation and springiness. If evergreen boughs are not available, twigs from deciduous trees, dry moss from trees or tundra, dry grass and brush may be substituted.
A good place for the boots is in a hole under the sleep-ing bag. The hole should be lined with boughs, extra clothing or other insulating material, except on top. If this is done carefully, the boots will not freeze during the night. Equally effective, but more uncomfortable is to take your boots to bed with you—but take them off. Boots can also be thawed over the cook stove—but don't get the leather hot.