This product is a set of two replacement filters designed for use with the Winix ZERO/J HR950/HR1000 air purifiers. The filters have a MERV rating of 15 and use activated carbon filtration technology to remove odors and other impurities from the air. The filters are made with meltblown non-woven fabric and have an ABS filter frame material. They have a filter life of six months and are compatible with both air purifiers and air conditioners.