This fully adjustable ergonomic seating is ideal for office, warehouse or training area. Contour built-in lumbar curve is 2-1/4" height adjustable to provide firm body support for increased employee productivity. 25° back recline infinitely adjusts for balanced posture. Pneumatic mechanism instantly changes seat height to help take pressure off legs. Seat back adjusts 2-1/4" in/out for accurate positioning of the body on the seat. Back cushion is contoured. Roomy seat with firm 2" foam cushion. Plastic shell back for long life. Comfortable 12"W x 8"H loop arms adjust 1" in/out. Includes armrests. Easy assembly. 1 Year Limited Warranty.