Fabric ALL-DAY COMFORT: The breathable mesh back, 3" thick contoured seat cushion, and adjustable lumbar support provide long-lasting comfort for these home office desk chairs CUSTOMIZED SEATING: Height- and width-adjustable arms provide a personalized fit for this mid back ergonomic mesh office chair with adjustable arms, making it a great home desk seat and comfortable work seat ERGONOMIC SUPPORT: The synchro-tilt mechanism plus seat glide adjustment ensure proper back alignment, seat depth, and a comfortable desk chair ergonomic experience for home office chair setups and computer desk use DURABILITY AND MOBILITY: The hard casters and five-star base provide sturdy support for this office chair, allowing it to easily move on any surface as a computer desk chair FULL WARRANTY: This office chair ergonomic mesh with back support supports up to 300 lbs. and is backed by the HON Warranty