More Air. More Wear. Easier breathing and more comfort are what you get when you wear an AirWave®respirator. The larger surface area of the patented wave design means more air flows in and out of the mask. More Comfort. More Use. More Durability. The unique FlexFit®design moves with your face for comfort all day long. The exclusive cool and comfortable mask has a Ventex valve, and a SmartStrap that allows you to adjust the mask for a custom fit. It has a soft full flange foam face cushion for no pressure points. More comfort means more compliance. The SmartStrap also allows the respirator to hang around the neck when not in use. The Dura-Mesh®shell prevents collapsing from heat and humidity so your mask lasts longer. Longer use means less waste and lower costs. Plus it's also metal free. 4400 Series With P100 Protection. NIOSH approved . Use Against: Particulate aerosols free of oil. Features: Exclusive easy-breathing wave design, Soft, cloth SmartStrap®is both hangable and adjustable, Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003. Sold 5/bx - 6bx/cs