Choose the position you need to work best with the customizing features of this mid-back chair with integral lumbar support. Soft armrests adjust in height and width while the arm pad pivots. The tilt lock freezes the back in four positions. Dual-action synchro tilt allows the back to recline at a 2-to-1 ratio to seat angle so you can recline while keeping the seat cushion relatively level to the floor. Other functions include pneumatic seat-height adjustment from 18″ to 21-3/4″ , seat-glide mechanism from 17″ to 18-1/2″ and tilt tension. The 20-1/4″ wide seat is made with 3″ thick molded foam for cushioned comfort. Seat and back are upholstered in boldly colored fabric. Back measures 19″ wide x 21-1/4″ high. Five-star nylon base is equipped with hooded, dual 60mm casters for easy chair movement.