Disposable Respirator, 2500 Series, N95, Medium/Large. Plus relief from nuisance levels (less than OSHA permissible exposure limit) of acid gas irritants. Exhale valve lets workers breathe easy and stay cool. Dura-Mesh® shell resists collapsing in heat and humidity. Softspun® lining for increased comfort and durability. Molded nose bridge with soft foam nose cushion increases comfort. Facepiece is naturally contoured without pressure points. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003 Section 7.11.1. 100% PVC-Free®.