Safco Products Company Stool Chair,Gel-Filled,Seat/Back Adjustment,24"x24"x22-32,BK Innovative design features resilient gel-filled cells that respond equally to your body's contour and shape. An evolutionary cushion maximizes comfort by improving distribution of body pressure. You have the sensation of sitting without weight. The longer you sit, the more comfortable you feel. Patented vacuum manufacturing process captures the gel-filled cells between a tough poly surface skin and a thick foam under layer. Features pneumatic seat-height, back height adjustment, 360-degree swivel and polycoated steel base.