Managerial mid-back, swivel chair features quality visco-elastic memory foam in the seat cushion. memory foam reduces pressure points, responding to contours of the body for lasting comfort over extended-use periods. design offers laminated hardwood with urethane top pads, a five-star base with wood caps and fully upholstered outer back. dual-wheel, hooded casters roll effortlessly and silently. functions include pneumatic seat-height adjustment from 16-3/4" to 21-1/4", 360 degree swivel, tilt, tilt tension and tilt lock. usable seat depth is 18-1/2". seat measures 22" wide x 21" deep. back dimensions are 22" wide x 18" high. chair is certified by scs to be in compliance with specific air quality emission requirements. meets or exceeds ansi/bifma and ista performance standards.