The MAC Air 4-Person Helmet Air Pumper (Bundle) is designed for dust control and comfort during activities such as desert racing and sand dune cruising. Made from injection-molded ABS polymer, the housing optimizes airflow, working with a special high static pressure fan. This combination creates a higher pressure and volume output than other helmet pumpers, utilising a dual filtering system for enhanced performance. The external pre-filter has micro openings to capture most dust and debris before reaching the internal filter. Both filters can be cleaned with water. Ease of mounting is facilitated by the included half-clamp bar mounts that fit most tubing sizes. The bundle comes with a Rocker Switch Variable Speed Controller (VSC) that can adjust the airflow volume, a waterproof power connector, a 12' power cord, four lightweight expandable hoses fitting the MagLock Helmet Air Kit, and washable pre-filter and intermediate foam filters.