The Tundra Aerogel Balaclava utilizes NASA-grade technology to deliver an optimal face covering for severe cold. It is made with 3L WINDSTOPPER fabric from GORE-TEX Labs, providing robust protection from harsh weather. Featuring ActiveTemp, this innovative fabric treatment automatically regulates body temperature in response to physical activity levels. It's insulated with PrimaLoft Gold Insulation Aerogel, offering a waterproof, compression-resistant layer that traps air to reduce heat loss in frigid environments dramatically. This balaclava also includes laser-cut breathing vents. It is constructed with flat seams, ensuring moisture-wicking, windproof, and breathable.