The whole suit is pep but the helm i just resined then sprayed the inside with low expanding foam then removed the pep shell (i should have left it on but the foam would not cure so i had to cut it off and cut the helm in half to expose the core so it would cure)the rest is pep resin,glass,foam inside resin paint outside.I tried many testings as you can see by my supply of test pieces.the foam is very lightwieght but harder to get detail hence the painted on detail.