Kensington Smartfit Comform Backrest Ergonomic Adjustable ChairDescriptionSpecificationsShipping Optimize your office chair with the SmartFit Conform Back Rest from the trusted industry leader with 20 years of ergonomic expertise. Its patented back support technology works in nearly any chair, as the SmartFit System gives you the power to customize the height of the back rest for maximum support to support your spine and lumbar region. So whether youre typing long documents, managing complex spreadsheets, or