Airhole's DWR Insulated fabric uses nature's best insulation. 100% duck down insulation creates high-loft clusters that trap air and body heat. In addition to its ability to efficiently trap heat, down is also incredibly breathable, allowing it to wick unwanted moisture away from your body to evaporate. Because of its supreme warmth-to-weight ratio and incredible compressibility - which makes it easy to pack - down is considered the crème de la crème of insulators.
The signature Airhole is standard on all of their masks and is designed to allow breath to escape freely, avoiding the build up of condensation to keep you dry, warm and goggles fog free. Stay out there longer.