Product review (3 stars): Make sure you get factory sealed
These filters do keep the air inside the fridge fresh. My ding is on the two-pack I got. They were just stuck in a ziplock to bounce around (and spread charcoal dust). Also, the bulk-pak approach did not include the little triangular time sensors so I'll have to replace the filters on a schedule rather than when they actually wear out. Hopefully, the single filters come in OEM packaging with the sensor.