My Winter Coat is pretty relaxed. It's a song about a winter coat, and it seems like a joke song, except it just keeps going on and on, and eventually you admit that the musician must really love her coat.
As a power song, it's eight and a half minutes, which is long enough to do something useful. Protection from cold is obvious, but I was thinking it might be protection from the elements more generally. "It's like walking around in your bed all day," after all. Plus I can just see Doug ready to head across the Sahara, and summoning up a parka. "Now I'm ready!" I assume that he could give the conjured coat to others too... it is a coat.
"Kitto daijoubu da yo." - Sakura Kinomoto