Hmmmm....I like my sleep mask. I will only use one kind though. It looks like the pic below. It's a soft satin material. It has adjustable velcro on the back. the thing I like about it is that it not only blocks out all light, but it goes over my ears and reduces sound. I won't wear earplugs to bed because they would be uncomfortable and then I wouldn't be able to hear anything. I'm a very light sleeper and I need to still be able to hear things that "go bump in the night". The other thing I like about the sleep mask I've used for years is that it also keeps my head warm when it's winter time. Also, since it's adjustable, on the occasions when I have a migraine, it feels good to really tighten it on my head. I don't know why that feels good, but it does.
