Ergonomic design racing chair--more efficiently and comfortably, multi-function meet all kinds of body shape. Material: Metal frame, easy to clean artificial leather, removable headrest pillow and lumbar cushion make it an ideal seat of choice for working, studying and gaming Function: The chair has rocked back and forth. 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: 26.5"(L) x 22.5"(W) x 47.5"-52"(H); Maximum weight capacity - 330 pounds. 1-year limited warranty. Assembly instructions included.