Whether you're typing long documents, managing complex spreadsheets, or creating engaging presentations, this ergonomic back rest makes working extended hours more comfortable. SmartFit system includes a color-coded fitting chart that helps you quickly select your ideal height setting to provide the most comfort and support for your spine and lumbar. Four independent springs allow the back rest to conform to your body type and articulate with any subtle movements in your posture to ensure you always have excellent support. Ventilated supports dissipate heat when you sit in the chair during extended seating periods to help you stay cool and dry. Removable fabric can be washed in a washing machine in case of an accidental drink or food spill, or when you just want to freshen up the fabric.