In 1889 Hamilton Carhartt began manufacturing men’s work clothing in the United States. Since that time, much of the apparel industry has moved its manufacturing operations outside the United States. Carhartt now offers garments guaranteed Union-Made in USA, right here in America.

Carhartt continues to own and operate unionized cutting, sewing and distribution centers in the United States and offers a "Union-Made in USA" line of workwear through its retailers, but items like t-shirts, knit caps, and even some lower priced items such as chore coats have been increasingly seen with labels from a foreign county though most feature American-made fabrics and components.