I know these guys who like the crisp air on 8,000 meter peaks. They bring skis sometimes too. But their feet get cold. Last winter one of those characters (Mike Marolt) told me his etail business would be selling Thermacell heated boot insoles, and that they “saved my feet and I couldn’t climb without them.” Sure, he sells the things but Mike is a straight shooter so I figured the insoles would be worth a test. Mike was right, they really do work. A few trade offs, but they’re lightweight, compact, and don’t suffer from the wire failure you can get with boot heaters with an external battery pack.

WildSnow.com publisher emeritus and founder Louis Dawson has a 50+ years career in climbing, backcountry skiing and ski mountaineering. He was the first person in history to ski down all 54 Colorado 14,000-foot peaks, has authored numerous books about about backcountry skiing, and has skied from the summit of Denali in Alaska, North America’s highest mountain. He published his memoir, Avalanche Dreams: A Memoir of Skiing, Climbing, and Life in 2024.







