I strongly recommend the Manta Sleep mask (no affiliation, just really like them). Adjustable non-contact eye cups, plus you can get different eye cup "mods" like cool (keep in freezer) or warm (microwave) cups that feel amazing. Amazon, or mantasleep.com.
Can second this, I got a Manta a few months ago and I love it. I sleep better when it's pitch dark and the sleep mask helps ensure that it is.
The only nitpick is that if you're a side sleeper (I am) it can be a little uncomfortable depending on what kind of pillow you use. I use shredded memory foam pillows and they're pretty firm.
The Manta has thicker materials compared to other masks, so when I turn my head on my pillow, the mask is often pushed off my face slightly. You can tighten it of course, but then its a comfort tradeoff. I wouldn’t recommend manta for this reason.
