The Mammut Snow Beanie uses a merino wool and nylon blend that adjusts to activity level, cooling down on a hard climb and holding heat once the pace slows. A fully fashioned crown knits the hat to shape without cutting or sewing, cutting material waste while improving how the knit stretches to fit. The result is a beanie that works as well on a ski tour as it does on the walk to dinner after. What Our Gearhead(R) Experts Are Saying:"I peeled my hood back on a sweaty skin track and left this on underneath without overheating. Same beanie kept me warm standing around outside a restaurant that same night, no swap needed."