Integrity Seating Ergonomic Mesh High Back Executive Office Chair Black This easy-to-assemble ergonomic design mesh executive office chair with adjustable headrest features a waterfall design that helps eliminate leg fatigue. Breathable Dupont Hytrel mesh upholstered seat, back, and height andamp; angle adjustable headrest. A synchro mechanism with backrest angle tilt that locks in 4-position and backrest tension control with built-in lumbar support.