This is very comfortable to wear, stays on your head and fits well.
I work shifts and this mask has been absolutely perfect and a life saver for when i'm nights and asleep in the day.
I purchased this to sleep because I have eyelash extensions and over I really like it but I don't know it I am just a crazy sleeper or what but I never wake up with the mask still on my face.
Depending on how you position the mask, it will or won't block out 100% light....because of the molded nose shape, it's really just going to depend on your face as you can't force it to fit, but wearing it either a little higher or lower should solve the tiny bit of light that might peek through.
I absolutely love this eye mask.
That is not why I gave it only one star, though.
One, the elastic bands have stretched out so much in the two months of use that they no longer work to keep the masks in place.
Next I tried to wash them, and this made the components separate and did not solve the bleeding/transfer of dye problem.
Plus, I had to sew them together to continue to use them.
Fell apart and stained my bedding .