Product review (3 stars): They fit perfectly but do not stay as moist as the Vornado MD1-0002
The filters fit our Vornado humidifier perfectly. They are, as others mentioned however, much less dense and so they do not stay as moist as the Vornado MD1 brand. This seems to be overcome by flipping them a few times throughout the day. In the end, the few dollars price difference just wasn't worth the effort for us.