I hiked the Appalachian trail during the winter with a very low bodyfat percentage. I learned to adjust layers constantly. Even in temperatures down near 0*F, y

I hiked the Appalachian trail during the winter with a very low bodyfat percentage. I learned to adjust layers constantly. Even in temperatures down near 0*F, you can become drenched in sweat while climbing a mountain. But once you stop moving (especially if you don't stay dry), you've got less than 5 minutes before you start to shiver uncontrollably, and complex tasks like pitching a tent start to become difficult. The most challenging part was moisture management, because gear never dries when it's below freezing and you're not wearing it.