Lightweight thermal liner is shoulder-length to keep head, ears, and neck covered, and fits comfortably under helmets or hard hats without feeling too bulky Features a 100% polyester quilted outer shell, a mid-layer of foam insulation to provide an additional layer of thermal protection, and a soft 100% polyester fleece lining for extremely cold environments Mouthpiece features a breathable and water-resistant 1mm neoprene outer shell construction to trap heat in and a soft fleece liner for additional comfort Four hook & loop straps on the exterior of the liner securely attach to the interior of a hard hat Features pockets by the ears designed to hold regular-sized hand warmers (sold separately) to keep ears warm and comfortable in extreme temperatures Elastic strip in the forehead area keeps the liner snug against the face to trap body heat in and keep cold out Detachable face mask design allows you to let in air or remove for speaking when needed Hook and loop closures on the mouthpiece have a secure and adjustable fit to prevent the mask from moving around Hard-shell design of the mask prevents it from being sucked into the mouth to allow plenty of breathing space Machine washable Colour Black Lining Material Fleece Middle Layer Foam Insulation Mouthpiece Liner Fleece Mouthpiece Outer Layer Neoprene Outer Layer Thickness 1 mm Outer Material Polyester Size One Size
