The Frostline Jacket has been specifically designed for the active hunter whose playground is in mountainous alpine and bush terrains, where high physical activity and cooler weather collide. The feature packed Frostline Jacket has a unique advantage thanks to its Air Permeable membrane inside its innovative 3-Layer Frostline Fabric. This highly breathable and stretchable membrane adapts and regulates your body temperature to the constant stopping and starting involved in the active hunt. A DWR coated outer layer repels water, blood and dirt; and the internal grid fleece lining promotes efficient heat circulation. So whether you're pushing up hill or glassing for extended periods, the Frostline Jacket will keep you comfortable and performing at your peak.