I don't know why it works, but it does
I read about charcoal and thought it was snake oil.  But its not.  And guess what putting it in an eye mask is Genuis. this is light weight and comfortable. Sometimes I sleep all night in it, and sometimes I just put it on in the morning if I want to get an extra hour of sleep or so int he summer. I ALWAYS travel with it.  One of the best investments.  Please continue to make this forever!
Rating: 5 stars