Yikes, did it ever suddenly get cold outside! Time to feature some warm winter wear, like this Mountain Hard Wear Zonal Vest. It's contoured to fit the body nicely so while adding minimal bulk it also keeps the warmth in. It's also fairly stretchy, so although it's form fitting it doesn't restrict movement or blood flow, which as you can imagine is a bad thing at anytime of year, but especially in the winter.
Like all Mountain Hard Wear stuff this vest is well thought thru in other areas too, like the warmly lined pockets, dual hem drawcords to keep the warmth in, and a lined chin guard that helps prevent the cold zipper from rubbing against your face.