Our ergonomic vinyl 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 medium bench height stools offer several customizable options, including your choice of casters or glides on a nylon-reinforced fiberglass base, and over 65 antimicrobial/antibacterial standard and custom vinyl color configurations. Optional foot rings are available in 18 1/4-inch diameter, black, nylon-reinforced fiberglass or 20-inch diameter chrome. Each ergonomic stool is backed by our 15-year warranty, lifetime on the pneumatic cylinder.