The M-65 is the classic U.S. military field coat. ... Alpha's Heritage M-65 Field coat in an original military spec fit. ... Signature wire field coat zipper. The M-1965 field jacket (also abbreviated as M-65) is a straight front, cold weather, field coat made of water-repellent fabrics. Initially designed for the US military under the MIL-C-43455 standard, it is now also worn as a civilian item of clothing.