I lived in a tent for a year (long bicycle trip), and I started sleeping in a hat because it was cold most nights. I started pulling the hat slightly over my ey

I lived in a tent for a year (long bicycle trip), and I started sleeping in a hat because it was cold most nights. I started pulling the hat slightly over my eyes at night, and my sleep has been better ever since. I probably couldn't wear a sleep mask, but I can't fall asleep well without a hat anymore.