As the weather grows cold this winter, you may be one of the many Americans pulling their winter jackets out of the closet.

Winter jackets for extreme cold—more often called parkas—are almost necessary in frigid climates such as Alaska, Minnesota, Canada, or Sweden. Depending on the activity and your material preferences, ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Longji Cui, University of Colorado Boulder and Wan Xiong, University of Colorado ...