US Military Uniforms MADE IN THE USA
The "Berry Amendment," 10 U.S.C. 2533a requires that the Department of Defense give preference in procurement to domestically produced, manufactured, or home grown products. This specifically applies to metals, food, fabrics and clothing. Congress originally passed the restrictions in 1941 in order to protect the U.S. domestic industrial base during time of war.
Although the law has been revised several times since then, the provisions concerning clothing and fabrics remain the same requiring all U.S. Military uniforms be manufactured in the United States by U.S. firms.
The American Recovery and Reinvestment Act (H.R. 1), passed by both houses of congress on February 13, 2009, included legislation offered by Congressman Larry Kissell (D-NC) mandating that any textile and apparel products contracted by the U.S. Department of Homeland Security’s (DHS) be manufactured in the United States with 100 percent U.S. inputs. The "Kissell Amendment" was modeled on and picks up, with little or no modification, many of the specific provisions of the Berry Amendment.
AF.Mil News Story
Berry Amendment - Wikipedia