Satin Sleep Mask - BlackBy sleeping with a Satin Sleep Mask, you naturally take care of your skin while you sleep. The most important signal that controls our sleep rhythm is light. Light tells our brains that its time to stop sleeping, prompting our body to release the wake up hormone, cortisol. By wearing a Satin Sleep Mask, you can sleep undisturbed, whether its light or dark outside. The Satin Sleep Mask blocks unwanted light, making it perfect for use at home or while