Chair pneumatically adjusts 8″ up or down while seated. Backrest adjusts 3″ in height and depth with ergo knob. Oversized, contoured seat with two-inch thick black microcellular seat cushion. Self-skinning polyurethane foam seat and back with 26″ diameter steel base. Large reinforced base ensures stability. 360 swivel may help users access adjacent work areas which may help increase movement and increase blood flow as well as the redistribution of pressure points during the workday.