When we are not going to let the weather stop us from getting out on a ride, the Castelli Unlimited 2 Puffy Jacket is our go-to. Featuring a lightweight and breathable design and loaded with Polartec Alpha Direct insulation, this jacket is everything we need for cycling in cold weather. The windproof outer layer sheds off the wind so we stay comfortable, and Nano Flex stretch fabric on the back of the sleeves, on the sides, and on the back provides optimal freedom of movement.