By Michael Lanza
There’s one certainty about the clothing layers we use in winter: We get our money’s worth out of them. While a rain shell or puffy jacket may rarely (or even never) come out of our pack on a summer hike or climb, we almost invariably wear every article of clothing we carry when backcountry, Nordic, or downhill skiing, snowshoeing, snowboarding, climbing, or trail running in winter. That’s money spent wisely to make us more comfortable and safer.