Functional insulation for energetic winter activities. The Women's Icy Creek Jacket is a fibre insulated jacket with very good wicking performance. This makes it good to wear on its own or as part of a layering system. By using the System Zip, it is quick and easy to zip it into a compatible outer jacket.It incorporates Jack Wolfskin's Microguard Maxloft synthetic fibre insulation, which ensures good heat retention and good moisture management performance. And when worn on its own, the jacket's windproof outer fabric protects you from wind chill.