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. Dillon vinyl-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.