This swivel ergonomic office chair was built to maximize your comfort with its triple paddle functions while sporting a stylish black and silver 5-star base. Achieve comfort with the ergonomically designed molded foam seat. The transparent mesh back allows air to circulate to keep you cool. Built-in lumbar support helps prevent back strain and you can adjust the back height a full 2" up and down. Easily adjust the back angle, seat height and tilt angle using three paddle mechanisms conveniently located under the seat. The locking back angle adjustment lever changes the angle of your torso to reduce disc pressure. Turn the tilt tension adjustment knob to increase or decrease the amount of force needed to rock or recline. Lock the seat in place with the tilt lock mechanism. When in need of a workhorse, this High Back Black Mesh Multifunction Executive Swivel Chair with Molded Foam Seat and Adjustable Arms will deliver results.