What Do Japanese Wear In Their Sleep?

I Just Want To Know, Especially The Teens... What Do They Wear In Their Sleep? Do They Wear Pyjamas? Or Just Simple Clothing Like T-Shirt And Shorts?

Additional Question:
What Do They Wear When They Just Stay At Home?

Thanks!

It varies by person. Some wear pajamas, some wear jinbei, some wear a t-shirt and shorts, some wear their underwear, and some wear nothing.

People wear very similar clothes to western countries. To sleep they wear pyjamas or whatever they find comfortable, if they stay at home they wear jeans, tracksuit pants and a T-shirt, or again whatever they find comfortable.

It depends a lot on the season of course, in most of Japan the summer is very hot and humid but the winter is fairly cold.

Thanks For Answering Guys! It's Very Helpful Info! =)