Seirus Innovation Original Mask with Adjustable Velcro Closure fleece The Original Masque uses patented technology from Seirus Innovation Neoprene Neoprene is an exclusive design created to be the warmest insulation on Earth Neoprene uses a five layer defense to keep you warm: tough outer shell DryHand waterproof/breathable liner, Neoprene , Thermolite synthetic down insulation, and wicking microfleece lining Best price point in a technical face mask on the market! The Masque is both reversible and washable. Adjustable Velcro closure ensures a comfortable and snug fit