When it comes to warmth bang for your buck, a lightweight Boa fleece is about as good as it gets. The soft and fluffy face traps warm air without adding unnecessary bulk. Kapital's BOA Fleece Alpine Pullover sports a throwback silhouette with quarter-zip collar and reversed BOA which puts the soft side against your body.
You won't get any points for flexing the fleece on the outside but you'll be more cosy so it evens-out.