Down Feathers as Insulation
Down feathers are the most effective and durable natural fiber used as insulation in clothing and sleeping bags. It’s exceedingly lightweight and compressible. Therefore, down is a magnificent insulator for use during backpacking, mountaineering, and arctic exploration. It’s also a real lifesaver for kickin’ it in Chicago in, say, January. Here, we will explore two broad aspects of down feathers. Where does down come from, and how does it perform?