AirPura Cotton Pre-Filter 2-pack is AirPura optional replacement pre-filter.
AirPura cotton pre-filter is made out of unbleached pesticide-free cotton and can be used instead of a standard polyester pre-filter.
AirPura cotton pre-filter is is available for concerned air purifier users or individuals with multiple chemical sensitivity.
The pre-filter can be vacuumed right through the metal mesh of the air purifier housing with a soft brush.
The pre-filter has to be replaced with new one when it gets very dirty or ruined.
The pre-filter's lifetime under normal residential conditions - up to 12 months.