The new Pro-Active jacket gives great warmth for weight with a water resistant outer shell and 85% duck down fill. The extended length and down filled hood add extra insulation making this jacket ideal for use on cold weather trekking trips and for mountain use throughout the winter. Fabric Hyperlite Plus water resistant outer with Duck Down insulation Specifications Hyperlite Plus water resist outer fabric 350g of 85/15 European duck down, fill power 560+EU/610+US Detachable down filled hood S