The Ironman Express Sock boasts FreshGuard anti-odor technology to keep feet feeling fresh every time. Dri-release technology absorbs and repels moisture, dries super-fast, and remains extremely soft wash after wash. The sock features a lightweight instep; cushioned sole; seamless toe closure; and a comfortable, foot-hugging fit. 65% Dri-release, 33% stretch nylon, 2% spandex fabric blend. Made in the USA.