The Jack Wolfskin Men's Viking Sky 3-in-1 Jacket is a warm combination designed to protect you from the weather on your winter adventures. The outer jacket is made from an extra durable Texapore fabric that keeps rain, snow and wind out. The fabric also expels moisture vapour effectively, so the jacket remains comfortable even during more intensive activity.The inner jacket features synthetic fibre insulation for optimal heat retention and the Stormlock outer fabric is totally windproof. If insulation is all you need, the inner jacket can be worn on its own by simply unzipping the System Zip and detaching it from the outer jacket. This means both jackets can be used all year round.