I ordered this in dark blue, and the mask was comfortable and worked perfectly.  After several weeks I noticed odd stains on bedding but could not figure out what was the problem.  The stains did not come out with bleach or scrubbing, by the way.  Eventually the stains became eye mask shaped and only got worse from there.  My sheets have been ruined.  If all your bedding is dark, this would be a great product.  If you use white, look for something else.