Foam, Mesh, Metal, Plastic, Plywood, Polyester ERGONOMIC OFFICE CHAIR: Experience the comfort you deserve with this durable and strong swivel chair with built-in lumbar support ideal for gaming, home offices, or as an executive chair VENTILATED DESIGN: Breathable mesh back allows air to circulate while the comfortably contoured padded waterfall seat with mesh overlay stays cool for all day comfort RELIABLE FUNCTIONALITY: Conforms to ANSI/BIFMA standard X5.1-17 and holds up to 250 lbs. static weight while featuring tilt lock, tilt tension, pneumatic seat height adjustment, flip-up arms, and a 5 star base with dual wheel casters ASSEMBLY AND CARE: Constructs in 30 minutes or less with the included tools and step-by-step instructions and wipes clean with a solvent and water based cleaner such as foam PRODUCT MEASUREMENTS: Overall Size: 26.5"W x 26.5"D x 40.25-44"H; Seat Size: 20"W x 20.5"D x 18.5-22.5"H; Back Size: 19"W x 23"H; Arm Size: 26-30"H from floor; 7.5"H from seat