Profile: 911 Safety Equipment, LLC carries a wide range of safety equipment. The C4 gas mask surpasses NATO and related Triptych protection requirements for face, eyes and respiratory tract protection against chemical & biological warfare agents when used with an approved filter / canister. The face piece compound provides true CBRN resistance and can be decontaminated to an operationally safe level. Extremely compact and lightweight, the C4 mask comes with a unique stretchy fabric head harness with six point attachment that provides an excellent fit & allows adjustment with just two pull straps that makes it easy to don and doff. The C4 gas mask's easy in-field maintenance requires a minimum of tools for assembly. The mask is equipped with an easy to use drinking system that adapts to the US M1 and Canadian canteen caps. The air-valve system provides airflow over the shatter proof polycarbonate lenses to assure non-fog performance.