The Slimfit N-3B is a cold-weather parka designed for extreme weather. The streamlined silhouette offers a unique fit, while the thick lining, Nylon shell and longer length offers superior protection against freezing and windy conditions. Theclassic N-3B designwas originally created to protect U.S. Air Crew and ground personnel during flight operations in severe cold and polar-based theaters. The slim fit is one of our best selling parkas, as it retains the protective qualities of the original Alpha N-3B but offers up a more contemporary fit that is perfect for the modern look. This mens jacket is our standard fit so we recommend you order the size you typically wear. Alpha Industries is a 55-year-old heritage military company that originally supplied the United States Armed Forces with durable outerwear. Now you can own an authentic parka made to the same high quality standards demanded by the US military. Each parka is uniquely designed and inspired by an iconic jacket in Alpha Industries history. We invite you to be a part of this history today!