it actually leaves black paint on your face [SEP] i liked it the first couple nights because then apparently i slept on my back only but then for one reason or another i started sleeping on my side and i started waking up with blackish grayish cast around my eyes at first i could not understand where it came from but one morning the grey imprint was so thick that there was no more doubt it is a shame since the design is great there is extra fabric not to let light peek in from under the nose from the sides of eyes they need to do something about the issue i described because otherwise it is a great eye mask dark enough to sleep well all through the night and morning have to give it only two stars because staining of my face is unacceptable