Any guitar players out there?

Does anybody know what type of foam might be used in a protective bag like this?

It says “dual-layer high density foam” (in person it’s actually quite soft and pliable, but seems super shock absorbant) and I’m wondering if by any chance anybody’s come across this bag in person and might know a little bit more about the specifics of the foam.


I’m pretty sure a lot of gigbags are compression molded EVA foam like what you see in footwear.