This is the Quartknee Computer Cover. The product is designed to remain on the computer at all times, preventing dust and debris from being drawn into the computer tower. This cover encases the tower in a breathable polyester material that has micron openings to filter out .005 or larger particles, with no build up of heat or loss of airflow. It is water resistant and washable with soap and water. Our dust covers are fully guaranteed for one year, with a no-questions-asked return policy within that timeframe. (Return shipping & handling costs to be paid by patron.)