HON Prominent High Back Task Chair - Mesh Computer Chair with Arms for Office Desk, Black (HVL532) BREATHABLE MESH COMPUTER CHAIR: This work chair's contoured sandwich mesh seat back cushion with two layers of padding keep your body happy, supported and cool so you can concentrate on work DURABLE DESIGN: This work chair is engineered for performance with 100% polyester seat upholstery with Nano-Tex soil and stain protection plus a fiberglass-reinforced resin five-star base ERGONOMIC ADJUSTMENTS: Let this comfortable office chair take care of your body while you work with an easy, adjustable recline and pneumatic height adjustment ON THE MOVE: Pull up to your computer desk, swivel around to collaborate with your teammate, or wheel over to the snack area for a quick break with this five-star resin base and durable wheels BASIC TROUBLE SHOOTING: Confirm that the cylinder is squarely mounted into the tilt mechanism, if not, remove and re-assemble. Confirm that the mechanism is mounted onto the seat pan in the proper orientation, if not, remove and re-assemble