Lightweight insulation for demanding ski touring and hiking trips. The Men's Icy Tundra Jacket jacket has three key attributes: it is warm, lightweight and robust. Three features that are particularly useful when you are engaged in strenuous activities in wintry conditions.It features Jack Wolfskin's robust Microguard Maxloft synthetic insulation. This new version transports moisture away from the body even faster. And the windproof outer fabric delivers enhanced heat retention performance. The jacket can also be used as a liner for a weatherproof shell jacket as it is equipped with Jack Wolfskin's Snap In system, which allows it to be docked with any compatible outer jacket.