What is a tension-adjustable mesh back on an ergonomic chair?

Tension-adjustable mesh backs allow the firmness of the mesh panel to be tuned to the user's weight and preferred support level — preventing lighter users from finding the mesh too stiff and heavier users from finding it inadequate. The adjustment is typically a knob or dial on the back frame that modifies mesh or frame flex resistance. High-quality tension-adjustable mesh maintains its calibrated tension over years of use without sagging. At OfficeFurniture2go.com, ergonomic chair specs note whether mesh tension is adjustable — call 1-800-460-0858.