Jack wolfskin northern jacket mens this jack wolfskin northern jacket is constructed with stormlock technology which provides you with 100 windproof protection as well as being breathable and water repellent this jacket benefits from a full length zip fastening for a secure fit that locks in body heat to keep you warm and snug as well as a hood to allow you shelter from wind and rain when outdoors the front of the jacket features two zipped pockets to store your small personal belongings