"The ""Chiro-Support System"" - Lower back support designed to emulate the hands of a chiropractor. Supports the natural S-curve line of your backbone. - A seat curve that tips the body forward. Supports your pelvis when you tend to lean in day-to-day life, to maintain a natural and beautiful posture. - Curves that wrap your thighs on both sides when sitting. Maintains your body at a level position to prevent leaning. "