Originally designed in the 1950s for cold-weather military use, the N3B Snorkel Parka is the only choice for quality cold-weather performance. Wrapped in a nylon shell, the Spiewak N3B Snorkel Parka is filled with warm polyfill insulation to keep body heat from escaping. The drawstring hood is surrounded in comfy faux-fur, which can be zipped off should weather heat up. Time-tested for over 50 years, the Spiewak N3B Snorkel Parka continues to be the best choice for cold weather protection.