These fabric 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. Fabric chrome chairs are constructed of highly durable molded polyurethane foam cushioning covered with heavy duty olefin fabric in 5 standard colors. Optional seat tilt provides 8 forward and 3&backward locking tilt for ergonomic posture support. These desk height chairs feature your choice of chrome-hooded casters or glides on a polished cast aluminum base.