Teko Socks' office is in Boulder, CO. The founder of Teko socks is Jim Heiden. Jim Heiden is active in outdoor sports such as mountain biking, cross country ski racing, back country ski racing, trail runner and mountaineer. Jim Heiden believes that making a high performance outdoor product didn't have to leave a heavy ecological impact and he wanted to make this happen. Teko socks are made with quality fibers that meet the criteria for achieving a high level of performance and yet has minimal impact on the earth. Efforts made by Jim Heiden to ensure that Teko socks leaves a little impact on the earth as possible is by using renewable energy. Teko socks has purchased enough wind energy credits to ensure that 100% of the electricity they use in manufacturing and operations get put back into the energy grid from clean, sustainable American Wind. Teko socks reduces, recycles, and reuses when possible to be able to minimize the amount of packaging needed for their products. You can feel assured that Teko socks are manufactured in the U.S.A. To quote Teko socks "The best socks on the planet; the best socks for the planet."