can be beaten out of the sock, but to get it out of the boot, use a 

 small, stiff-bristled brush. The insole should be removed as soon 

 as the boot is taken off ; otherwise, it will freeze in the boot. In- 

 soles keep their shape better if interchanged each day. 



Change socks after returning to camp. Wash both socks and 

 insoles and dry them over the stove by hanging them near the top 

 of the tent. Another method is to place socks next to the body 

 while traveling. Even though the temperature is below freezing, 

 some drying will occur. Do not attempt to dry socks in a sleeping 

 bag unless the temperature is above zero. Leather boots should 

 not be greased in cold weather as grease is a poor insulator and 

 will make the boots colder. Greased boots will freeze stiff during 

 the night. Before sleeping, spread open the uppers of the boots 

 so that even though they may be frozen, the feet can be slipped 

 into them the following morning. 



KEEPING CLOTHES CLEAN 



Oil from the body, collecting on underwear will fill the tiny air 

 cells (the properties that make the underwear warm) in the gar- 

 ment. To a lesser degree, the same is true of other clothes. 



Figure 5-3. The body give^ off about a pint of perspiration a day. 



163 



