Is Made in America just marketing spin? When Fortune set out to find companies that are diehard American, we expected a challenge since businesses today, large and small, stay competitive by relying heavily on the global marketplace for services, suppliers, and skilled labor. As we began digging, a number of companies were quickly ruled out because their global conglomerate parents had absorbed some operations post-acquisition — for example, Ben & Jerry’s by Unilever and Burt’s Bees by Clorox. Our guidelines: identify consumer products whose operations, manufacturing, and workforce are located entirely within the United States. Here are 13 companies that have remained, mostly, made in America.