[This santa got the feeling that Wren wasn't going to be okay with a traditional house for warmth, so he goes with something Wren an carry with him:
The tent is insulated, and could probably handle a Repose winter just fine on its own, but wishes and magic turn it into something spectacular. Whenever Wren pitches it, it's perfectly warm inside. It doesn't just keep out the cold. It's like having a heater at the perfect temperature, always. It comes with all the required stuff for carrying around, and this santa tosses in a wish to make it light as a feather, so that Wren can always carry around a warm place to sleep.]