Very light and quick-drying ArmourDry technology improves performance. It disperses moisture evenly, allowing sweat to evaporate faster for a lighter, drier, cooler run. Breathable mesh ventilation channels where it's needed most. Arch support helps reduce foot fatigue. The anti-odor technology reduces odor in the sock. The seamless toe provides excellent comfort and reduces irritation. Specific cut and design for left/right side. Reflective logo for running in low light.