Only girls wore them.
Legend had it that our heads would fall off, or something, if we didn't wear one.
Sometimes I would wear it to sleep just so I didn't forget to wear it to school the next day.
Sometimes it would get lost in my blankets and I would leave it there.
It had a very small headband sewn in that would pinch the sides of my head and ride up so it looked like my beanie was a trucker hat way before that look was cool.
If you forgot your beanie during the week it was mostly okay, if your teacher wasn't a Nun. If she was (and mine usually were) you would get detention and have to stand against the wall at recess and suffer humiliation as the other kids played and you pretended that you wanted to stand there and watch. I used to stand as far from the wall as possible so it looked like I was visiting the detention kids and not part of them. I forgot my beanie a lot because I couldn't stand wearing anything on my head since I don't look good in hats .
The entire school would attend Mass every Friday and for the girl's that meant a beanie must be worn.
I never forgot my beanie for Friday Mass.
Because, if you forgot your beanie you were sent to the bathroom to rip off a single sheet of toilet paper and the Nun's would pin it to your head with a straight pin or a bobby pin, whichever they had handy and could be pulled out of the depths of their habit.
Some forward thinking parent started a petition or rally or something and had them banned from our uniform code a few years into my education. We only had to wear them for Friday Mass.
There was nothing cool about those beanies. . .
except. . .
they covered the fact that I had a severe case of bed head so I started a school wide campaign to bring them back.