No matter how impressive your 5k time, a bad pair of socks can make or break a run, so be sure to turn to Falke's expertise next time you hit the track. Specially formulated for sprinters, long-distance joggers and the maybe-I'll-walk-for-a-bit-ers alike, the RU4 socks provide optimum comfort with moisture-wicking cotton-blend fabric and triple-layer construction. Plus, silicone threads put a definitive end to that annoying sensation of feeling your sock slide away.