Thorlo Thin Padded Running Ankle Sock Padding Level: Thin Cushion Key Benefit: Thorlos Protection = Incredible Comfort Proudly MADE in the USA | North Carolina Constructed with THORWICK COOL fibers for superior moisture-wicking for drier, cooler feet. Cushioned arch for a better fit, more support and more comfort Low profile toe seam wont rub or irritate feet Padding in the ball and heel absorbs shock and is specifically engineered for protection and comfort while running Fiber Contents: 70% Exclusive THORWICK acrylic, 27% nylon, 3% spandex