Rating: NIOSH-certified N95 for at least 95% efficiency against non-oil-based particulates. Design: First and only NIOSH-approved single adjustable cloth strap design with a Flexwing® head harness for easy on/off and custom fit. Ventex® Valve: Exhalation valve that lets hot air out faster to keep the wearer cooler. Dura-Mesh® Shell: Resists collapsing in heat, humidity, and regular use so the mask holds its shape longer. Pinch-Free Nose: Molded nose bridge seals without needing an adjustable metal noseband. Comfort: Softspun® lining and a soft foam nose cushion for all-shift wear.Packaging: Typically sold in quantities of 10 masks per bag.