The latest high altitude and extreme weather balaclava from Outdoor Research utilizing PrimaLoft® Aerogel insulation around the nose and cheek bones to help prevent frostbite.  An extremely sophisticated and purpose-driven detailed design that combines 4 different types of materials. A good balaclava is one of the best pieces of emergency gear that you can bring on your mountain adventures, since you can loose a lot of heat through the head and neck areas.