An update for our best-seller: This new wind jacket is lighter than the previous model. Plus, it’s now water resistant and breathable with Dynashell Ultralight. The materials offers a small degree of stretch to improve freedom of movement as well as to increase comfort on longer runs. Thumb loops offer protection for the hand in windy and colder weather conditions. A snugly fitting hood can be rolled up and clipped in firmly when needed so it does not move about when running. For additional breathability, there are technically engineered laser perforations on the back. When the jacket is not needed, it can be packed small.