Half Mask Respirators. These respirators feature soft, comfortable, great fitting facepieces for superior comfort and protection, built-in exhalation valves, low profile replaceable cartridges for better vision, and come in recloseable packaging for easy and safe storage. The Toxic Dust Respirator traps over 99.97% of toxic dust including lead, asbestos, and Hantavirus. Meets the latest US government respirator standards (P100 Class) and OSHA and NIOSH requirements. The Multi-Purpose Respirator provides further protection from paint fumes, (except urethane paints), pesticides, lead fumes, ammonia, asbestos, and toxic dusts. Meets OSHA and NIOSH requirements. Cartridges are interchangeable between respirators.