At 95% Merino and very low-profile, we originally conceived this beanie for Wildland Firefighters working cold night shifts and long, late season campaigns. But we're so impressed by the result, we think this piece will prove crucial across all our tribes. The key is Merino wool, a miracle material. Spun from the wool of Merino sheep, its natural properties are ideal for an all-season beanie. This fabric excels at body temp regulation, stays warm when wet, and owns a stellar warmth-weight ratio. Not only that, it's among the softest types of wool, so itchy scalp--under a helmet, or worn alone--isn't an issue. All of this translates to the perfect head-warmer for any application: high alpine summer night, autumn day behind the spotting scope, or mid-winter tour, this hat will keep you warm and dry.