blocks the light
Granted I can only wear one at a time but these masks work great for blocking the light and so far they are very comfortable. My only issue is when I got my package 3 of the 4 masks were packaged together and fourth mask was separate.  I was disappointed to that the 4th mask, the separated one, was not of the same quality.  It was like they ran out of the same mask as the other 3 so I got a cheaper quality one as a "consolation."  I did not spend a ton of money on these so it wasn't worth making an issue about.  As long as they are comfortable and do the job I am happy.
Rating: 4 stars