It is reported that after China discovered silk, they chose to keep it a secret from the rest of the world for nearly 2000 years! While man has spent decades trying to copy silk with products like synthetic satin, nothing has ever come close to providing the benefits of the real thing.Sleeping with a silk pillow case is an ancient Chinese beauty secret. In fact, it is also known as the anti-aging secret to prevent wrinkles and hair loss. A silk pillow-case has numerous special qualities and besides hair loss and wrinkle prevention it is also effective to naturally regulate temperatures unlike synthetic satin and other man-made imitations.