N95 particulate respirator with exhalation valve NIOSH N95   N95 particulate respirator. Polypropylene inner layer for facial comfort. Patent-pending adjustable head strap buckle. Metal-free construction. Unisex.   box of 20     Product Description N95 particulate respirator with exhalation valve. Polypropylene inner layer for facial comfort. Patent-pending adjustable head strap buckle for personal adjustment. Metal-free construction for environments where metal is not allowed. Cool latex-free cloth head strap for comfortable wearing. Continuous loop head strap design can allow hanging the mask around neck when not in use. Pre-shaped nose cushion and soft closed-cell nose foam ensure custom shape and increase the worker comfort. Contour design ensures the compatibility of glasses/goggles and reduces fogging.