For more than 75 years, Serta has been an industry leader in comfort products worldwide. That tradition of innovation and quality continues today. From a brand that is synonymous with quality, comfort and style, the Serta Back in Motion Health & Wellness Super Mid-Back Office Chair offers an amazing new support feature called Active Seating Technology (AST). AST offers continuous motion and support by pivoting the seat and lumbar with you as you move. AST also has been shown to replicate the pelvic tilt exercise which can be good for reducing seated discomfort. The sum total offers your back a continuous support experience you’ve never felt before in an office chair. Next, is the soft and supple upholstery in smooth black eco-friendly bonded leather with contrast stitching. The deep, ergo layered body pillows offer the body a serene and tranquil seating experience. Stylish push-button height adjustable padded armrests for precise arm positioning and added hand, wrist, and forearm comfort. Measures 27-Inch wide by 30-Inch deep by 43.75-Inch high. It is delivered in 1 box measuring 31-Inch long by 25.25-Inch wide by 18-Inch high. 1 year limited warranty. Product assembly is required. Designed in the USA. Manufacturer style number is 44186 .