4x4xl High Back Task Chair is an economical chair that provides all-day comfort with its contoured cushions and ergonomic features. Tilt-tension control with tilt lock allows you to adjust the recline rate based on your weight. Center tilt with adjustable tension gives you the ability to rock. Back-angle adjustment sets the back angle for personalized comfort in a reclined position. Seat-height adjustment allows you to set the height to the desired position relative to the floor. Waterfall seat slopes to reduce pressure on the back of your knees for extra comfort. Forward seat tilt changes the angle of the seat to enable proper ergonomic posture while using a computer keyboard. Arm-height adjustment lets you to move the arms up or down for proper ergonomic positioning. Ratchet-back height adjustment allows the backrest to easily adjust relative to the seat for personalized lumbar region support and comfort. Foam-upholstered chair adds soft comfort to any space.