What Our Gearhead(R) Experts Are Saying:"The ventilated arch keeps things from getting stuffy on longer runs and FORMOTION means the sock actually moves with your foot instead of bunching. Reflective cuffs are a small but real safety detail for anyone logging miles before sunrise or after dark."The best running sock is the one you stop thinking about after the first block. The Adidas Reflective Run Crew Sock gets there with a lightweight polyamide build and CLIMACOOL that pulls moisture away fast enough to keep your feet in a consistent, comfortable state mile after mile. FORMOTION construction adapts to your foot's movement rather than fighting it, and ventilated arch support keeps airflow where heat tends to build. When the light drops, reflective cuffs on the ankle earn their keep without adding bulk or weight.