Its flexibility allows everyone to customize their comfort and move more freely and naturally in workstations, collaborative environments, meeting rooms and more. Features a responsive, ilira-stretch mesh back to provide all-day comfort and support. Synchronized seat and back provide proper balance, alignment and lumbar support and can be adjusted with a single lever. Synchro-tilt mechanism reclines the back at a higher ratio than the seat for proper back alignment. Adjustable-height arms move up and down. Functions also include 360-degree swivel, pneumatic seat-height adjustment from 18 to 23 in, tilt tension and upright tilt lock. Waterfall seat edge promotes better leg circulation. 300 lbs capacity. Black.