Enjoy optimal working comfort with the Fellowes Professional Series Back Support. The 2-tiered support system features a mid spinal support for good posture, and a lower lumbar support that conforms to natural body curvature. Innovative Tri-Tachment system eliminates the need for readjustment. Memory foam responds to back weight and warmth for custom support. To set-up, place the support on your chair, position yourself comfortably, and clip the straps in place. Fully adjustable design fits most office chairs.