I know yoga mats are thinner than EVA foam, but I don't think it can hold on to the shapes though. Don Robert, I believe he is from Philippines, make insane costumes. He uses some kind of rubber that I don't think we can find here. Hope this helps.
http://www.405th.com/showthread.php...NMAN-10.10.10-(not-fiberglass...it-s-rubber!)
oooh wow thats good! Id love to find the stuff he is using, Im heading out tomorrow to look at different materials, floor mats, yoga stuff, and general rubber stuff to use, Id like to find something around 5mm for the helmet and some thinner stuff to add details to the armor parts, I really need to find some paint I can use that will flex a bit.