When I was a little kid, I—like many other little kids—had a security blanket, and I became accustomed to falling asleep by sort of draping said security blanket over my eyes. I can’t tell you why it was so soothing to drift off with a blanket directly on my face, I can only tell you that it gave me a sense of peace…
Source: LifeHacker – This Sleep Mask Is Basically a Weighted Blanket For Your Face