Our ergonomic fabric stools adjust to fit most body types and workstations. The upholstered cushion includes highly durable molded polyurethane foam. Additional ergonomic benefits include an adjustable back rest with lumbar support for increased comfort during extended sitting durations. Optional seat tilt provides 8 forward and 3 backward locking tilt for ergonomic posture support. These desk height stools feature several customizable options, including your choice of chrome-hooded casters or black glides on a polished cast aluminum base, and five standard color configurations. Each ergonomic stool is backed by a 15-year warranty, lifetime on the pneumatic lift. Our upholstery consists of 100% olefin fabric.