Review (4/5): Best sleep mask I have ever used, with a flaw.
One star off because it is hard to adjust small enough for my admittedly somewhat smaller head and the elastic stretches out quickly. The velcro barely overlaps on me, just enough to hold when the mask is new, but within a short time, the elastic stretches out and I can no longer get a snug fit. An extra inch of velcro would solve this deficiency. For the price, around $6-7 each, replacing them frequently is affordable, but it is wasteful. They are otherwise well-designed and well-made. They even hold up well to a gentle hand-washing.
Update August 2017: Still happy enough with these masks, but the last batch I received don't block out light as completely as I remember my previous masks doing. They look the same, but I'm wondering if there's been a change to the filler material. One of these days I will open one of the old ones and see if it used to be filled with black floss, or have an extra layer or something else that made it block light better.