However, our bottom has a natural s-shaped curve.  To force a naturally curved shape onto a flat manmade seat is the main cause of pressure sores a.k.a. decubitus ulcers.  To overcome this dilemma, Karma’s R&D team started developing the Smart-Ergo System.  S-Ergo was developed based on the ergonomic perspective.  It took two years of development with thousands of computer simulation and therapists’ recommendations.  S-Ergo can provide sound pressure relief according to tests using pressure map measuring equipment.  The S-Ergo System can offer significant pressure relief and therefore reduce the risk of decubitus ulcers.  S-Ergo also provides the user great stability and reduces sliding.  S-Ergo is the wave of the future.