What is the opinion of Reddit about the
Cotton Sleep Mask for Men Women, Handmade Eye Mask for Sleeping, Light Blocking / Breathable / Comfortable Blindfold, Eyeshade for Airplane / Nap / Travel with Earplugs?

I would highly recommend a fabric eye mask that wraps around your entire head. They are extremely good at blocking all light and staying in place. I use them when I am working nights and sleeping during the day – and can sleep easily in a room that is completely bright.

Lots on Amazon… like this one, or this one.