We cats each have our own way of enjoying bags. Boodie, for example, enjoys just lying next to them. She hung out there like that for half an hour and never went inside.
I prefer the more usual way of enjoying a good bag!
Sadly, my human took the bag away from us to use for recycling cans. For some reason she thought Binga would be happy with this dumb pillow. Do you think she looks happy? Me neither.