DUX features a unique, interconnected spring system that adjusts itself to the weight and shape of your body. It moves as you move. It conforms to your changing contours, providing continuous, dynamic support along every point of your body. DUX's patented spring system is flexible enough to let your shoulders and hips sink in, yet resilient enough to rise up and support your lower back. Vital pressure points — especially your spine — are supported in the most ergonomically healthy positions possible, letting your blood circulate freely while your muscles completely relax.