Old Navy is having a sale on outwear for the family 12/12-12/13. Get Frost Free Vests for $12 and Frost Free Jackets for $20. No coupon is needed but this is while supplies last. In stores only.
There is also an Old Navy coupon available for $10 off your purchase of $50 that you might want to print.
I bought one of these, and they are very warm.