Kevlar

But Nicodemus drew a gun from the back of his belt.
He shoved it against Michael's breastplate and pulled the trigger. Repeatedly. Light and thunder made even the rushing train sound quiet.
Michael fell and did not move.
The light of the two swords went out.

Death Masks Chapter 32, Page 297-298


When I woke up again, I was in a small bedroom. Stacks and boxes and shelves of fabric filled the place nearly to the ceiling, and I smiled, recognizing it. The Carpenters' guest room.
On the floor next to the bed was Michael's breastplate. There were four neat holes in it where the bullets had gone through. I sat up. My shoulder screamed at me, and I found it covered in bandaging.
There was a sound by the door. A small pair of eyes peeked around the corner, and little Harry Carpenter stared at me with big blue-grey eyes.
"Hi," I said to him.
He dutifully lifted his pudgy fingers and waved them at me.
"I'm Harry," I said.
He frowned thoughtfully and then said, "Hawwy."
"Good enough, kid."
He ran off. A minute later he came back, reaching way up over his head to hold on to his daddy's fingers. Michael came in the room and smiled at me. He was wearing jeans, a clean white T-shirt, and bandages over one arm. The cut on his face was healing, and he looked rested and relaxed. "Good afternoon," he said.
I smiled tiredly at him. "Your faith protects you, eh?"
Michael reached down and turned the breastplate around. There was a cream-colored material lining in the inside of the breastplate, with several deep dents in it. He peeled it back to show me layers and layers of bulletproof fabric backing ceramic strike plates set against the front of the breastplate. "My faith protects me. My Kevlar helps."
I laughed a little. "Charity made you put it in?"
Michael picked up little Harry and put him on his shoulders. "She did it herself. Said she wasn't going to spend all that trouble making the breastplate and then have me get killed with a gun."
"She made the breastplate?" I asked.
Michael nodded. "All of my armor. She used to work on motorcycles."

Death Masks Chapter 33, Page 301-302