Zensah Invisi Running Socks 98% Nylon/2% Spandex Made in US No-Show Look + Stays in Place: We developed the InvisiTab(TM) at the top of the running socks to prevent them from slipping or sliding into your running shoes. Spandex in the sock helps ensure it stays in place. Dry and Lightweight: Made of our lightweight, moisture wicking Zensah fabric, the running socks wick away moisture to help your feet stay dry and comfortable even during the longest runs. Anti-Blister: A seamless toes ensures no blisters. There is no chaffing or irritation. Whether using the athletic socks for running, basketball, football, working out, and any activity, your feet will appreciate the difference. Thin Sole: Unlike bulky cotton running socks that may affect the fit of your favorite running shoes, the Invisi No-Show Running Socks fit perfectly. Made to Last: The Zensah Invisi Running Socks are made in the USA and are designed to last. If the sock does not hold up, simply contact us for a replacement.