Our ergonomic vinyl Upholstered chairs adjust to fit most body types and workstations. Optional 6-way adjustable arm rests support a variety of arm placements for proper ergonomics. Additional ergonomic benefits include a contoured waterfall Seat cushion and an adjustable back rest with lumbar support for increased comfort during extended sitting durations. Vinyl chairs are constructed of highly durable molded polyurethane foam cushioning covered with easily cleaned antibacterial/antimicrobial vinyl available in over 65 standard and custom colors. Optional Seat tilt provides 8° forward and 3° backward locking tilt for ergonomic posture support. Optional foot Rings are available in 18 1/4-inch diameter black nylon reinforced fiberglass or 20-inch diameter chrome. These medium Bench height chairs feature your choice of casters or black glides on a nylon reinforced fiberglass base. Each ergonomic chair is backed by our 15-year warranty, lifetime on the Pneumatic lift.