100% Polyester ERGONOMIC HIGH-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 PRESSURE-RELIEVING COMFORT: Ventilated high mesh back with integrated lumbar support prevents overheating and promotes better posture, while the padded contoured waterfall seat helps relieve pressure from the legs ARMRESTS AND CASTERS: Flip-up arms relieve tension from the neck and shoulders or can be placed upright to bring you closer to the desktop, and the 5-star base with dual caster wheels enables easy movement HIGHLY CUSTOMIZABLE SEATING: Features a pneumatic height adjustable seat that swivels 360 degrees and has a tilt lock with a 120-degree tilt tension to create a custom seating experience for all body types EASY TO ASSEMBLE: Measures 26.5" W x 26.5" D x 40.25-44" H and can be assembled in less than 30 minutes with the included tools and ins