Plywood, Metal, Foam, Plastic, Mesh ERGONOMIC MID-BACK OFFICE CHAIR: Provides exceptional seating for everyone from the CEO to the front office staff, ensuring the perfect balance of ergonomic comfort and optimal support for each employee COMMERCIAL GRADE CHAIR: Has a sleek and versatile design that makes it perfect for use in front offices, executive suites, at-home work desks, college dorm rooms, student study spaces, or just about anywhere PRESSURE-RELIEVING COMFORT: Ventilated curved mesh back with integrated lumbar support prevents overheating and promotes better posture, while the 3" padded waterfall seat helps relieve pressure from the legs HIGHLY CUSTOMIZABLE SEATING: Features a pneumatic height adjustable seat that swivels 360 degrees and has a tilt lock with a 120-degree tilt tension, and the flip-up armrests provide convenience and ease of access EASY TO ASSEMBLE: Measures 24.5" W x 25.5" D x 37.5-41.25" H and can be assembled quickly with the included tools and step-by-step instructions, and it wipes clean with a damp cloth for easy cleaning