Toto Black Mesh Back Operator Chair With Black Fabric Seat & Black BaseToto Black Mesh Back Operator Chair With Black Fabric Seat & Black Base Not only does this office chairs mesh back keep you cool, it is also designed with contours that cup your spine for optimal lumbar support. If you work long hours, then this feature will enable you to sit comfortably for longer periods of time. The gently curved backrest on the Toto operator chair follows the shape of your spine nicely, and the mesh material allows ventilation