Recently I spent several days snowshoeing in the Adirondacks with a group from our Scout troop. Nighttime temperatures dropped to -10 F and wind chills on top of several peaks we climbed were even colder—a perfect place to test a variety of gear items from the latest clothing layers to a new solar array that allows you to recharge all of your electronics.

Here’s what a typical morning thermometer reading looked like. While this is pretty chilly, you warmed up surprisingly fast on the trail.