Apollo High Back Multifunction Chair features a ratchet back that moves up or down relative to the seat for lumbar support and comfort. Set back at an angle for personalized comfort in reclined position. Seat-height adjustment lets you position the seat height relative to the floor. Adjust tension to rock back and forth. Seat depth slides relative to back for ultimate, customized seating. Fabric-upholstered, padded, waterfall seat with sloping front reduces pressure on the back of the knees. Tilt-tension control with tilt lock allows you to adjust the recline rate based on your weight. Tilt seat forward to change the seat angle for a comfortable position when you're using a keyboard. Depth-adjustable arms slide forward or backward for proper ergonomic positioning. Arm-height adjustment adjusts arm up or down while arm pads angle in or out. Nylon, five-star base features casters for easy mobility. Chair is Greenguard certified to have low chemical emissions.