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tresses offer reasonable warmth, the foam plastics are better insulators (see page 20). For example, a 3/8-inch piece of ensolite 30 by 15 inches will provide ample insulation at extremely cold temperatures. Effective insulation under the sleeping bag is essential at such temperatures. Extra clothing.—A complete change of socks should be carried. Damp or wet socks conduct heat from the feet. A long Balaklava helmet of loose-knit wool will, when worn under the windproof parka helmet, protect the throat, the back of the neck, chin, the nose, and, indirectly, the lungs. Personal items.—These must be kept to a minimum in weight. A small hotel-size bar of soap will serve. The extra bandanna makes an adequate towel. Each man should carry a metal cup, which should be easily accessible in the rucksack. |
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