According to relevant information, wool itself keeps warm, and pants are the best way to keep warm. It can keep out the cold firmly.

Wool is mainly composed of protein. The use of wool by human beings can be traced back to the Neolithic Age and spread from Central Asia to the Mediterranean and other parts of the world, thus becoming the main textile raw material in Asia and Europe. Wool fiber is soft and elastic, and can be used to make woolen cloth, wool, blankets, felts and other textiles.