The Perfect Blend of Style and Substance. The Pro SL Socks II are designed for the rider who demands "pure class" without compromising on performance. Crafted from elite Meryl® Hydrogen yarn, these socks are feather-light and buttery-soft, offering exceptional breathability and moisture-wicking properties. With a high-density mid-foot elastic for rock-solid support and a flat-seam toe for all-day comfort, they are the definitive choice for even the fussiest riders.