Air pneumatic

Your search for a great, supportive office chair ends here. Sigma's office chair is superior in functionality, and style. The breathable mesh backrest and mid back design provides the ultimate in comfort and convenience.Material: Breathable mesh for backrest and Polyester fabric for seat. Base: Nylon base for strength and durability. It is used for 360 degree movement. Ergonomic Feactres: The mid back design gives you maximum lumber support for comfort & convenience. Curved shape on edges of seat reduce pressure on thighs and lower lumber. Seating: Metal frame with mesh back for air circulation. It helps sitting for longer hours. Lumbar Support:  Adjustable for both height and curvature of the back. With this you can make the chair support your lower back just the way you want it to. Adjustable Features: Single lock pushback mechanism to allow user to adjust back in upright position.  Knob is used for tension adjustment. It helps harden or soften back recline. Lever for height adjustment for comfortable operation of chair movement Pneumatic Height: Pneumatic seat height adjustment up & down Arm:  Fixed arms provide excellent support to the shoulders and upper body