We went down to the yarn level to make our fastest-drying socks ever. The fabric evenly disperses moisture, allowing sweat to evaporate more quickly, so you'll run lighter, drier, and cooler. Ultra-fast drying Armour Dry™ yarn technology improves the performance of your shoe Material evenly disperses moisture, allowing sweat to evaporate quicker for a lighter, drier & cooler run Mesh panels on top & bottom of foot for added ventilation where you need it most Medium cushioning placed strategically throughout foot protects high-impact areas without added bulk Material wicks sweat & dries really fast Anti-odor technology helps prevent odor in the sock Embedded arch support reduces foot fatigue Fitted heel contours around your foot for a better fit Style #: 1361156 Left/Right specific construction for better fit Reflective details for low-light runs Single pair 91% Polyester/5% Nylon/4% Elastane Imported