HandyStrap allows mask to conveniently hang down around the user’s neck so its always ready for use, preventing premature disposal. Exclusive Dura-Mesh shell protects the filter media so it stays cleaner-looking longer. Shell resists collapsing, even in heat and humidity. Contour-molded nosebridge with soft foam face cushion for an easy, comfortable fit. No metal noseband to adjust, and the seal is maintained without pressure points. Softspun lining for added comfort and durability. NIOSH certified to have a filter efficiency of 99.97% effective against non-oil based particulates. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003, Section 7.11.1.