Originally issued by the U.S. Army to infantrymen in 1951, the M-51 Fishtail Parka is an icon that has lived on in films, pop culture, and military surplus shops. Relwen rebuilt it from the ground up into one of the most weather-ready and versatile pieces in their collection. The jacket has two parts: a durable, weather-resistant shell that blocks wind and rain, and a detachable insulated liner for warmth and added wind protection. It’s faithful to the mission of the military-issued original, while being lighter, stronger, and offering greater protection from the elements.