These 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 backrest 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 bench height stools offer several customizable options, including your choice of casters or glide on a 25" 5-Leg nylon reinforced fiberglass base, and over 65 antimicrobial or antibacterial standard and custom vinyl color configurations. Optional foot rings are in nylon-reinforced fiberglass.