The Daiwa Supreme Hybrid massage chair is an innovative chair that perfectly blends the benefits of both S-track and L-track chairs! Not only do you get the seat massage that only an L-track can offer, but you also get the unique stretch capabilities of an S-track. It’s all made possible by the Supreme Hybrid’s double roller system, called HybriFlex. It has a dual roller track that runs up and down your back and a completely separate quad roller track that runs across the bottom of your seat (gluteal and piriformis muscles) to your lower back muscles. This gives you a full body massage like no other chair can, PLUS the two separate roller tracks allow for the chair to recline to a completely horizontal, even inverted, position allowing for a full body extension stretch. This chair is also loaded with the following additional features: self charging wireless remote, 4D L-track configuration, heated knee massage, quick keys, wireless phone charging port, foot rollers, and so much more.