Invisible Smart Posture Corrector Back and Shoulder SupportInvisible Smart Posture Corrector is made of food grade silicone material, it is lightweight and durable, soft and skin friendly, not easy to deform, fits the human body curve, and is comfortable to wear. The built in high precision chip can accurately record the posture, monitor the change of the body inclination angle in real time, and vibrate to remind. The automatic memory function can intelligently sense incorrect posture, monitor posture in real