The most advanced back support in the industry Mid-spine support with memory foam cushion Tri-Tachment system ensures stability and eliminates the need for readjustment This 2-tiered support system features a mid spinal support with memory foam cushion to promote good posture, and a lower lumbar support with three memory foam sections that conforms comfortably to natural body curvature Fully adjustable design fits most office chairs To set-up, place the support on your chair, position yourself comfortably, and clip the straps in place Dimensions (WxDxH): 355x381x50mm Weight: 2.36kg