Have you opened up standard Kevlar body armor and seen the Kevlar pieces? It’s entirely feasible to put those same pieces in his oversized suits. Obviously, those are for small arms. For his center mass they’d put higher caliber protective plates, as well.
Lined with what? As far as I’ve seen that’s not really feasible with current materials.
Have you seen Trump’s suits? Dude could be wearing half inch plate under that monstrosity.
Have you opened up standard Kevlar body armor and seen the Kevlar pieces? It’s entirely feasible to put those same pieces in his oversized suits. Obviously, those are for small arms. For his center mass they’d put higher caliber protective plates, as well.