Synchro-tilter chair features a mesh back that allows air to flow freely to help you stay cool throughout your day. Seat-height adjustment allows you to sit at the proper height at your desk. 360-degree swivel lets you effortlessly rotate the chair for added convenience. Waterfall seat edge and contoured cushions provide ergonomic support to help prevent muscle strain. Adjustable lumbar support provides excellent support for your lower back to help prevent strain. Height-adjustable arms can be set to accommodate a wide range of users. Dual-wheel casters glide smoothly across floors for effortless adjustments.