MSA10023883 / 10023883 RESPIRATOR PAPR OPTIMMM2K MSA OptimAir® MM 2K PAPR The OptimAir® MM 2K PAPR is designed for work in abatement, nuclear, lead and other hazardous particulate environments. The PAPR filters particulates and provides a constant flow of respirable air to the Ultravue® or Ultra Elite® Facepiece. The mask-mounted motor/blower with HEPA filter has a low-profile design that enhances user maneuverability and simplifies decontamination. The PAPR includes a small, lightweight, water-resistant nickel metal hydride (NiMH) battery pack that will operate for eight hours of continuous use. NIOSH approved.