The Kensington®/SKILCRAFT® Ergonomic Backrest with adjustable back and the unique SmartFit™ system technology works on nearly any chair and gives you the power to easily customize the height of the back rest for maximum firm support to support your spine and lumbar region. Four independent springs conform to fit your body shape and articulate with your posture and position. Ventilated supports allow for air circulation to keep your back cool and dry. Whether you’re typing long documents, managing complex spreadsheets, or creating engaging presentations, make the extended hours of working in your home or office more comfortable. Adjustable straps allow back rest to fit most chairs. Nylon fabric cover can easily be removed, and machine washed as needed. 2-year warranty. TAA compliant.