By Michael Lanza
For hikers, trail runners, climbers, and others who play hard outside, fall, winter, and spring—and sometimes summer in the high mountains—challenge our ability to dress comfortably. You’re hot one minute, cold the next.
There’s a simple explanation: Temperatures below about 55° F. are cold enough to induce hypothermia; but when exerting hard, we can sweat even in temps well below freezing, and sweat conducts heat away from the body, making you cold. The key to comfort? Smart management of what you wear and your body temperature during activity.