Super precise foot-hugging hold that's ready to race. A thin, foot-hugging sock so minimalistic you'll forget it's there. Ideal for fast-paced short to mid-distance runs and races, our Pulse Race Flag crew socks are made from softer-than-soft micro nylon with essential protection on targeted areas. The updated design is inspired by our historic race flag colors.The nylon is light yet durable with a thin, close-fitting feel. Made from softer-than-soft micro nylon. With an elasticated arch and ankle area for foot-hugging hold.