Some call it "sleepphones", "head band earphones", and whatnot. Whatever it is, it's life-changing.
Before this, I'd use an eyemask and earbuds. While trying to sleep, the earbuds would cause some pain, as I roll on my sides. With this, I can now safely drift off into lalaland.
Also to note, I know a lot of people who wear it for running or sports, running it as a sort of headband. I don't personally, but can definitely see the utility in that.
