Moldex® 2300 Series disposable respirators allow workers to stay cooler with an exhale valve that reduces hot air build up. There's less breathing resistance and workers don't have to break midshift to cool off. The molded nosebridge with soft foam nose cushion provides the wearer and easy, comfortable fit. There's no metal noseband to adjust and the seal is maintained without pressure points. The exclusive Dura-Mesh® shell protects the filter media so it stays cleaner-looking longer. The shell resists collapsing, even in heat and humidity so the respirator holds its shape longer. The result is fewer respirators used and lower costs. 2300 Series Particulate Respirators are suitable for most welding application. The Dura-Mesh shell resists collapsing in hot humid conditions common to most welding applications. Meets heat and flame resistance in accordance with ANSI/ISEA 110.2003 Section 7.11.1. These respirators are great for working in 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. No oils present. 100% PVC-Free. 10 respirators per box. 10 boxes per case.