DESCRIPTION: 3M4251 Respirator (FFA1P2R D) Maintenance free design for maximum safety and simplicity. Low resistance parabolic valve to reduce heat build-up. Soft/Non-allergenic face piece material. Supplied in a hermetically sealed foil bag to extend shelf life and prevent contamination. Meets European standard EN405:2002 for valved filtering half mask respirators for gases or gas and particulate combinations Organic vapour and particulate respirator One piece carbon filter elements with built-in P1 or P2 filters with low breathing resistance A soft, low profile face piece for added comfort and peripheral vision Efficient parabolic valve to reduce heat and moisture build-up to provide easier breathing An adjustable head cradle assembly and easy to fasten neck strap