Innovative design of True Comfort stool 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 and is upholstered in 100 percent vinyl. 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 thick foam under layer. Chair holds up to 250 lb. Seat size is 20" wide x 19" deep. Functions include pneumatic seat-height adjustment, seat depth adjustment, back height adjustment and 360-degree swivel. 24" five-star steel base has dual wheel, hooded 2" carpet casters.