Modway Reverb Premium Office Chair - EEI-1173Reverb is a flexible and responsive chair built for years of ergonomic comfort. Designed to offer support over both your lower and upper back regions, the flexible nylon back and waterfall seat design help keep you alert, while effectively distributing the weight of your body. The pneumatic lever and tension control knob fine tune the chairs height and tilt to personalize Reverb, while the pivot and height adjustable armrests make sure your upper body