Hands down, my woobie is my bestie!
I also have one of the Army smoke jackets which is basically a woobie jacket! Best thing I've ever owned. And it was free,, sorta. It's super lightweight, packs great and put it under any outer layer and it's like turning on the heat
A woobie and smoking jacket are the two pieces of gear I don't leave home without. The Army has some really stupid gear most of the time, but they got those two pieces right.