Here are some photos of Nolan sock-less but not immune to the cold. As you can see, he can move two feet to the right and be on carpet, not the cold tile, but he moves to the tile and then lifts his foot off. Or just scrunches up the toes indicating it's cold.
I'll be really sad when he grows out of this shirt, it's so funny, a thermal hoodie with a t shirt over it. He looks like a mini teenager... well, except for the Elmo on the shirt.