Affordable, USA-made Thorlo performance, durability and quality for runners, these low cut Experia By Thorlos Fierce Ultra Light Running Micro Socks have a glove-like close fit and perform mile after mile, cushioning the underfoot and helping keep feet dry and aerated. The socks are made using hydrophobic (moisture-repelling) polyester that offers enhanced moisture transfer, off and away from the skin, and quick drying so feet are as dry as possible throughout the run. Typical running strike zones are reinforced for a more durable sock.