NIOSH approved for at least 95 percent filtration efficiency against certain non-oil based particles. Designed to direct exhaled air away from the nose panel, helping reduce eyewear fogging. Curved low profile design conforms well to nose and eye contours, allowing more room for eyewear. Individual packaging and flat fold design provides convenient storage and portability. Innovative chin tab designed for ease of positioning, donning, and adjustment. 3MTM Cool FlowTM Valve (9211+) option available.