I saw a girl in one walking down the street. She was so stick-skinny and the top of the top half was held up by massive elastic, but it was supposed to have a bit of give in the middle. She didn't have anything to fill it with, and it was hanging down. The bottom bit was so short it was covered, and until the wind picked up it looked like she was just wearing a shirt.
Then again, when the wind picked up, she grasped at it around her chest like she was afraid it would fall.