Are you looking for a very different kind of sleeping mask? Then I can recommend you to take a look at Sleep Master Sleep Mask. It comes with a built-in sound muffling function to reduce noise. So, It will help in maintaining both darkness and silence which will ensure a very rich sleep.
It is pretty different kind of sleep masks that I have reviewed before. It is similar to a blanket wrapping your face. Definitely, it’s a sleep mask with which you can stay comfortable in any position you want, especially side position.
Tim Ferris also uses this sleep mask. He mentioned in his post “5 tools for faster and better sleep“, I got a feeling that you must be curious about it.