The Wigwam Thunder Pro Low cut running sock features the Ultimax moisture management system that rapidly moves moisture from the foot to the leg so it can evaporate quickly. It has been enhanced by the introduction of Dri-Lease fabrication for dry feet, no blisters and no odor. It has foot hugging fit with the feel of cotton in a high performance fabrication. Wigwam is a 105 year old United States manufacturer of socks and provides a 2-year performance guarantee.