I've been using a sleep mask every night for many years; I've had good ones and bad, I've even tried making my own. This is by FAR the  best sleep mask I've ever used. It's soft on the face and smooshy (technical term) enough that it blocks out all light but doesn't crush your eyelashes or press on your eyelids. The band is wide and adjustable and the clasp doesn't catch in my hair.

My only problem is that it's summer in San Diego and the sleep mask is rather... absorbent. So I'm buying a second one to switch in the night and let the other dry out.

I've had no issues with any colour bleeding and it washes up well (I only hand wash, though).