MudGear Trail Running Socks for Men and Women, Made in USA - 2 Pair Pack 95% Polyester, 5% Spandex Made in USA SUPER COMFORTABLE - Built to provide comfort, wick water, and prevent blisters over long miles STRONG CONSTRUCTION - Made for outdoor sports like Spartan Race and Tough Mudder, but comfortable for running, hiking, training and all-day wear MEDIUM ANKLE COMPRESSION - Keeps out trail debris and mud VENTED MESH TOP - Breathable mesh reduces heat and increases comfort SATISFACTION GUARANTEED - Small (Men 5-7 / Women 6-8), Med (Men 7-9 / Women 8-10), Large (Men 10-13 / Women 11-13) High quarter ankle built to keep out dirt from the trail Superior handling of water and mud Long lasting comfort