Developed in collaboration with the Alaska Mountaineering School, the Denali was designed from lessons they learned over decades of high altitude mountaineering experience. Designed to handle the coldest of days in the mountains, it features more wool content than any previous Farm to Feet sock, with 91% of its material composition consisting of 22 micron US Merino wool. Adding to its comfort is a 4-ply wool foot bottom for additional underfoot insulation and cushioning. The Denali features a ribbed section between the ankle and top of the foot that ensures the sock stays in place. While designed for use with mountaineering boots, the Denali is suitable for ice fishing and other cold weather pursuits.