This t-shirt, like most t-shirts made in the world, contains 100% American cotton. And that's not because the US makes the best cotton or the most efficient cotton, it's because the US government subsidizes cotton production. And that's what makes this cotton cheaper than cotton of similar quality from Brazil or India. But in the last 30 years, the US's share of cotton exports has gone down as Brazil, India, and Africa's cotton exports go up. And that trend will likely continue as the US moves away from its expensive cotton subsidies. In fact, these days it's already possible to find t-shirts with Brazilian, Indian, or Ugandan cotton, or a mixture of cottons from all around the world. But because the American government doesn't subsidize industry in the way it does agricultural production, the actual spinning and weaving of the cotton takes place in lower-wage countries – Mexico, Guatemala, Vietnam, China, India, China, China, sometimes even China.