These filters was hard to find because of how old my air purifier was. However, I checked on Overstock and ordered immediately! Great buy!
Very good air filter
I've tried several different brands of air filters and have found the Winix to be top-notch. Sturdy, dependable, and as long as you change out the filters as they recommend, it does an excellent job at filtering odors and particulates. I have several in my offices and in my home.