Night comes early.
The arctic air shows no sign of haze or humidity, promising the darkest skies of the year. Studding the icy blackness will be such bright riches as Orion, Canis Major, Gemini, Auriga, Perseus, and Cassiopeia. In fact you can enjoy winter nights comfortably for hours on end if you dress properly and heed a few cold-weather tips that everyone should know. Of course some insulators are lighter than others, per inch of dead air space provided, and have other desirable properties. Vigorous hikers and skiers need light, flexible materials that wick perspiration away from the skin so it can evaporate without leaving a clammy, cold feeling.