The hand with the glove on didn't get as cold as the other one. The ice cube that I was holding in the hand that had the glove on it didn't melt as fast as the one that did not have the glove on it. The first time, the hand with the thick sock was not cold and with the thin sock, both hands were cold. Fiberglass, wood, and stone are good insulators. The hand without the glove will get cold because the is no insulation between my hand and the ice cube.
Leaves can keep the ground warm.
Pine needles can keep the ground warm, too. Snow can also keep the ground warm. Styrofoam can keep water cold or hot, but when you leave it, it well get warm. Fiberglass keeps my house warm. USA I have shiny teeth, but I have four cavities.