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¡ã-160¡ã safety angle; Armrest and seat-height adjustment; 360-degree swivel; 5-point base is built with heavy duty and smooth-rolling casters. With GTracing, more efficient at work. With GTracing, more comfortable at game.