Hey Lorin. Most of our socks are made in the North Carolina, but a lot our products are produced all over the world, including the United States, Vietnam, Thailand, Taiwan, El Salvador, and Mexico. To create the best running gear in the world we partner with factories that have high levels of expertise in manufacturing quality performance gear, and who do so ethically and sustainably. The mix of product created at each facility can vary based on manufacturing needs, so we aren’t able to specify what products are made where. Each item is labeled appropriately.
Take a look at our Running Responsibly page to get a feel for Brooks' take on corporate social responsibility: https://www.brooksrunning.com/en_us/meet-brooks/running-responsibly/
You may also view our complete factory list at the following link under the "Standards, policies, and transparency" heading: https://www.brooksrunning.com/en_us/running-transparency/