There is a sweet spot between protection from the elements and breathability. It's the Mezzalama. Weighing in at just 295 grams and insulted with Polartec Alpha this is Dynafit's lightest insulating layer. The insulation primarily runs down the chest and back so that you can be sure to stay warm where you need to and breath everywhere else. This light layer of insulation still moves moisture away from the body so there's no need to worry when you work up a sweat. Reflectors make sure you stay visible at night and two large front pockets are perfect for on the go storage. Equipped with a hood and just the right material to cut the wind this is a critical piece to always have in the kit and especially on those cold mid winter skins up.