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 curved mesh back with integrated lumbar support prevents overheating and promotes better posture, while the contoured waterfall seat helps relieve pressure from the legs PADDED FLIP-UP ARMRESTS: Relieves tension from the neck and shoulders and is great for users who like the option of an armless chair without the hassle HIGHLY CUSTOMIZABLE SEATING: Pneumatic seat height adjustment lever makes it easy to raise and lower the seat, while the tilt tension adjustment allows you to rock or recline or lock the seat in place 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 step-by-step instructions, and it wipes clean with a damp cloth for easy cleaning