Antimicrobial treated; dry tactified polyester air filter media. It’sAegis microbe shield not only eliminates the filter as a potential breeding ground for micro-organisms, when tested, they reduced airborne micro-organisms by up to 86.5% in a single pass through the filter!

BioSponge plus features a special dual density design to allow for a extended 60 day filter life and a 60% increase In efficiency over regular BioSponge media.