Looks like a Miura fold: https://en.wikipedia.org/wiki/Miura_fold. When going to theme parks and the like, I love folding the physical maps like this. It's nice that the maps stay rigid when fully open, and the single-motion for opening and closing is glorious.
Miura-ori fold covered very nicely in this video at timestamp 34:10: https://www.youtube.com/watch?v=8p02DtmyQhU
That whole video is really neat, love the guy teaching!
I think I spent too much time watching the video of it folding and unfolding.
Same :)
I hope my brain stows your comment safely away until the next opportunity.