Mid-back chair frame features a mesh back that allows air to flow freely when you're seated to help you stay cool throughout the day. Ergonomic design supports the natural curvature of your lower back to help prevent strain through extended seating. Height-adjustable arms can be positioned to accommodate your personal preference. Seat-height adjustment with tilt tension allows a variety of users to sit comfortably at their desk. 360-degree swivel allows you to effortlessly rotate the chair for added convenience. Chair frame is designed for Lorell upholstered fabric and leather seat cushions (sold separately).Mesh back helps you stay cool throughout your dayErgonomic design offers enhanced comfort during any taskAdjustable arms meet your exact preference for enhanced comfortHeight-adjustable seating allows you to sit comfortably at your desk360-degree swivel rotates completely for added convenience