Matrix back lets the air flow for cooling comfort while you work Built-in lumbar feature supports your lower back and enhances the natural curve of your spine. 2-to-1 synchro-tilt control and 4-position lock help you find the right position. Seat cushion slides forward and back for a customized fit. Effortless 1-touch seat height adjustment. Padded, height-adjustable armrests help relieve shoulder strain. Dual-wheel carpet casters let you move from 1 task to the next.