DetailsJack Wolfskin Women's Size Chart You’re not going to let frosty temperatures spoil your fun. And why should you, with the SKYWIND JACKET to keep you warm? The NANUK fleece delivers outstanding thermal insulation. Both the exterior and reverse side of the SKYWIND have a soft, brushed texture, so the jacket feels very pleasant to wear. The SKYWIND is equipped with a system zip (SHORT), so you can zip it into a compatible outer jacket.