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Insulating headwear at its finest hour, the Alpha Direct Beanie, filled with Polartec Alpha active insulation allows for a dynamic, breathable thermal layer that you will leave on for the slog uphill to the jaunt down.
Polartec Alpha was originally developed for the U.S. Special Forces when they needed an advanced insulation material for their combat uniforms. This fabric is a new technology with active insulation that regulates core body temperature during dynamic and static activities. With this advancement of adaptive breathability, users don't have to without constantly putting on or taking off extra layers of clothing.