Question for any friends who are cosplay nerds: do you know what this foam is called?
It's fairly robust/solid, compared to the squishier stuff I've seen in, say, craft sheets.
The pic is from a cellphone screen-protector package; I'm interested in making a similar frame for post-it notes, but it's super hard to find names of raw materials in these modern web times.
(In gratitude, if you know I promise not to mock cosplay nerdery for 24 solid hours, which I assume would be a lifetime record.)











