Mid-back swivel chair features a mesh back that provides superior comfort with contemporary split "Y" design, adjustable lumbar support and air circulation. High-density, highly resilient molded foam covered with high-quality black fabric offers more comfort and will retain its ability to support far greater than standard-cut foam. A single-lever control provides one-touch seat-height adjustment and adjustable tension so you customize the chair position to meet your specific preferences. Synchronized tilt control provides reduced front edge rise while reclining. When desired, a convenient back lock prevents the back from reclining. Height-adjustable arms with soft pads provide comfort and support in all tasks. Fiberglass-infused, reinforced nylon base with high-performance casters delivers strength, support and comfort. Adjustable arms are sold separately. Weight capacity is 250 lb. Chair exceeds ANSI/BIFMA standards and is Green-Guard Certified.