The Energy Armor Negative Ion Serenity Sleep Mask is a product line based on customer feedback that was looking for a way to keep a negative ion charged sleep cover for all spectrums of sleep. As a result of that claim we have developed and launched this mask. So if you want to embrace your body fully with negative ions, this is one way to do that while you sleep. You can take this with you on an airplane ride or even "road trip"! Join our Facebook community and learn of what other customers and fans have had to say about the serenity sleep mask today!