The Tundra Aerogel Balaclava uses NASA-trusted technology to deliver the perfect face mask for long, frigid winter days in alpine environments. This balaclava is made with 3L WINDSTOPPER® by GORE-TEX® Labs to block wind and weather. ActiveTemp™, a thermo-regulates smart fabric treatment, manages body temperature according to the output level during high-exertion activities. PrimaLoft® Gold Insulation Aerogel delivers a compression-resistant, waterproof thermal barrier comprising millions of air pockets that reduce heat loss from cold elements. This balaclava features laser-cut breathing vents and flat-seam construction and is wicking, windproof, and breathable. Whether exploring the Arctic or needing reliable protection against cold winter winds, the Tundra Aerogel Balaclava is an excellent choice for anyone seeking the ultimate warmth and comfort.