The Thorlos Large Adults' Experia Micro Mini Crew Running Socks are made of polyester, nylon, and elastic fabric and feature Lycra® mesh frames for breathable, comfortable wear with Thor-wick COOL® fabric technology to help keep your feet feeling dry. These socks feature Thorlos pads in the balls and heels and lightweight Achilles tendon pads for cushioning. Made in USA. Thorlos Large Adults' Experia Micro Mini Crew Running Socks Black/White - Athletic Socks at Academy Sports