The lightweight 4-leg version of Cachet (weighing only 11 pounds) stacks five high on the floor. There’s a lot more to Cachet’s sleek design than meets the eye. Cachet adjusts to the way you sit. Its innovative materials and “balanced action rocker” mechanism evenly distribute your weight in response to your movements. The result is non-stop comfort, without the need for adjustments. The arms flip up and out of the way so you can get closer to your work. The frame is made of nylon which provides strength without added weight.