This cover goes over a loaded clothing rack. There are relatively few times these would be needed, but if you do need them, they would be a lifesaver as they will prevent inventory from getting damaged. If you expect to leave clothing on the rack undisturbed for a long time (measured in weeks or months, not days) these would keep the dust off of the clothing. A second time would be if during a Pop-Up boutique, you travel with the clothing on the racks and at the final location, there is a large amount of rain or snow coming down. These would protect the clothing from the trailer into the home. This cover fits a 6 foot rack, but 5, 4, and 3 foot covers are also available.