Durable material wicks sweat & dries really fast. Locked-in fit design with more compression keeps sock securely on heel for an adjustment-free fit. Breathable mesh on top of foot & calf for ventilation. Medium cushioning placed strategically throughout foot protects high-impact areas without added bulk. Built-in arch support helps reduce foot fatigue. Odor control technology reduces odor in the sock. Seamless toe delivers superior comfort & reduced irritation. Color: black