The Berghaus Men’s Cornice Jacket IA is a classic Gore-Tex waterproof jacket designed specifically for walking and hiking. The outer of the jacket is a smart classic design and features a waterproof, windproof and breathable Gore-Tex membrane for complete weather protection. Features of the Cornice Jacket IA include an attached roll-away adjustable hood, two lower zipped hand pocket, a zipped map pocket, an InterActive main zip so you can zip in a compatible fleece and hem and waist drawcord adjustments. Weight: 769g Gore-Tex Gore-Tex is a waterproof and highly breathable membrane that stops wind and rain while allowing moisture vapour to escape, keeping you dry and comfortable. Gore-Tex is a highly durable waterproof membrane keeping water out through prolonged use even in the harshest of weather. It is completely windproof, meaning cold winds can’t pass through and create unwanted cooling. A Gore-Tex membrane contains over 9 billion pores per square inch. These pores are 20,000 times smaller than a water droplet, meaning water can’t pass through, but are 700 times larger than a molecule of water vapour, meaning perspiration can escape easily. The membrane is bonded to high performance shell fabrics providing durability and further water repellency whilst being seam sealed for complete waterproof performance. Gore-Tex products are guaranteed to keep you dry and come with a waterproof guarantee.