Oakley’s Boot Socks are American made and feature a Hydrophobic construction of 52% Polyester, 27% Drymax Olefin, 12% Elastane, 9% Nylon. The vented panels at the top allows for more air flow and breathability and they come in 3 sizes ensuring the right fit everytime. Features of Oakley Boot Socks10" TallMoisture Wicking Hydrophobic Drymax FibersAntimicrobial to Keep Socks Odor FreeBreathable Mesh ConstructionVented Panel on Top of the Foot52% Polyester/27% Drymax Olefin/12% Elastane/9% NylonProudly Made in USA Oakley Boot Socks Black FOS900195-001, XL