Apollo Synchro High Back Chair combines comfort, adjustability and quality for seating well-suited for long hours at the office. Breathable, black mesh back conforms to your back for the right amount of support. Fabric-upholstered, cushioned seat is comfortably contoured. Padded waterfall seat with sloping front reduces pressure on the back of the knees. Tilt-tension control recline rate adapts to weight of user. Tilt lock locks out tilt function. Synchro-tilt back reclines in a preset ratio to seat. Seat-height adjustment sets seat height from 18.9" to 22.4" for your preferred position relative to floor. Width-adjustable arms adjust arms in or out for proper ergonomic positioning. Arm-height adjustment adjusts arm up or down for proper ergonomic positioning while seated. Chair also features casters on the black nylon, five-star base for easy mobility. Chair is Greenguard certified to have low chemical emissions.