3M PA30IS HEPA Filters, Pack Of 6

Designed for use in environments requiring intrinsically safe (IS) performance Lightweight, ergonomically designed blower and belt assembly reduces worker fatigue while improving maneuverability. Features include up to 10 hours of peak air flow, advanced NiMH battery technology, a decon-friendly design, longer service life cartridges and a unique "in the ear" audible alarm.