Ergonomic design racing chair–more efficiently and comfortably, multi-function meet all kinds of body shape. Material: easy to clean PU leather, removable lumbar cushion make it an ideal seat of choice for working, studying and gaming Function: Adjustable backrest with a 90°-170° safety angle. Armrest and seat-height adjustment; 360-degree swivel; 5-point base is built with heavy duty and smooth-rolling casters; Dimensions: 27.56″(L) x 20.1″(W) x 40.06″-49.2″(H); Maximum weight capacity – 330 pounds. 1-year limited warranty. Assembly instructions included.