My sleeping system for Denali worked a treat and ensured I always enjoyed a good night’s sleep on North America’s highest peak
The coldest I have ever been in my life was while climbing Denali – hardly surprising considering it’s one of the coldest and windiest places in the USA. During the expedition, there were several times when I felt the cold intensely, so much so that I even suffered some mild frostbite on my fingers after we were delayed on the fixed ropes for several hours. That said, I was never cold when safely cocooned in my sleeping bag.