Professional Series Ultimate Back Support - Innovative Tri-Tachment™ ensures stability eliminating constant readjustment - Built in Microban protection fights the growth of harmful bacteria for the lifetime of the product. - 3 Section lumbar support expands and contracts to natural body curvature - Thoracic Support is contoured with a low density foam to optimise the postural support in a subtle application - Fully adjustable design allows it to fit most office chairs - Easy setup: Place support on chair, position your back and just clip the straps!