Safeguard yourself and employees from potential workplace hazards. Particulate respirator. Exhalation valve. 10/Pack. Handy strap allows mask to hang comfortably around neck when not in use. NIOSH approved. 2700 series. Size: Medium/large. Filter classification: N (non-oil particulates). Filter efficiency: 95. Recommended for hot, humid and dusty environments such as welding, soldering and brazing, grinding, sanding, sweeping, bagging, stone quarrying, metal machining, cement, underground mining, polishing, buffing, lime, poultry and textiles. Suspension: HandyStrap. Ventex valve lets the hot air out faster so workers breath easier and stay cooler. Soft foam nose cushion for added comfort and no pressure points. Dura-mesh shell resists collapsing in heat and humidity. HandyStrap, with buckle, allows mask to hang around the user's neck when not in use. Cloth HandyStrap feels cool and comfortable. Available in two-sizes, for most workers and increased OSHA compliance. 100% PVC-free. Softspun lining for increased comfort and durability. Weight: 0. 06 lbs.