This DXRacer Racing series in black / blue is ergonomically constructed with a slimly built body similar to the Formula series, but with an even taller backrest. The 2-dimensional armrests and the fully adjustable backrest (between 90-135 degrees) allows for extra customizability to fit your personal preferences while performing different tasks. The star base and the SGS certified gas lift holds weights up to 100 kg (approx. 220 pounds). The headrest and lumbar cushions along with the dense cold foam in the seat help you sit up straight and keep a good posture even after long hours in front of the computer. The control unit makes it possible to rock back and forth or lock entirely in a horizontal position. The 2" casters are made of PU-plastic and roll smoothly over flat surfaces.