Rothco ECWCS Full Face Cover and Helmet Liner AR 670-1 Coyote Brown. Specifications for Rothco ECWCS Full Face Cover and Helmet Liner: Manufacturer: Rothco Fabric/Material: 100percent Expedition Weight Polyester Features of Rothco ECWCS Full Face Cover and Helmet Liner: Extremely Versatile Face Covering With Multiple Applications Can Be Used As A Hardhat Liner Helmet Liner Neck Gaiter Winter Face Mask And More Three-Panel Design With Flatlock Seams Enables The Reusable Face Mask To Form A Comfortable Buffer Between Your Head And Your Military Or Tactical Helmet While Providing Robust Thermal Insulation Extreme Cold Weather Face Mask Is Part Of The Extended Cold Weather Clothing System (ECWCS) Developed By The American Military In The 1980s Lightweight Balaclava Mask Is Constructed From Rugged 100percent Expedition Weight Polyester For Several Seasons Of Reliable Use All Winter Long One Size Fits Most 14" Flat Length 11" Flat Width And 6" Eye And Nose Opening Package Contents: Rothco ECWCS Full Face Cover and Helmet Liner Rothco 5508-AR670-1CoyoteBrown: ECWCS Full Face Cover and Helmet Liner AR 670-1 Coyote Brown