"Thorlo® Experia X Speed Ultra Light Low Cut Rock: The Thorlo® Experia X Speed Ultra Light Low Cut Rock is a thin-cushion running sock designed for runners who want a low-profile fit that stays in place during daily training and road running. Made in the U.S.A., this unisex sock combines lightweight construction with moisture-management technology so you can focus on the run without distractions. The low cut profile keeps the sock out of sight, while Rocket Grip Technology lines the inside of the cuff to prevent slipping - no mid-run adjustments needed.Built with 58% Repreve nylon, 31% nylon, 9% elastic, and 2% Silicotex, the sock delivers moisture-wicking fibers that pull sweat away from your skin and breathable mesh zones that promote airflow to keep feet dry. Ionic+™ Technology releases silver ions in the presence of moisture vapor to reduce odor-causing bacteria across repeated use. The unique X design on the instep provides arch support, while anatomical left and right foot shaping delivers a more precise fit than a standard sock. Y-heel engineering with a rib cuff prevents bunching, and a smooth toe seam reduces friction during longer efforts. A reflective logo detail adds visibility for early morning or evening runs.Why Our Fit Experts Love It""I wore these on a warm morning run and noticed the Rocket Grip Technology actually kept the sock from creeping down - no bunching at the heel after five miles. The mesh zones made a noticeable difference in keeping my feet dry as the temperature climbed."" - Sawyer, Road Runner Sports Fit Expert, Wilmette ILWho It's Best ForThe Thorlo® Experia X Speed Ultra Light Low Cut Rock is best for runners and athletes who want a thin-cushion, low cut sock for daily training, road running, and tempo work. The unisex fit and anatomical left and right construction suit a wide range of foot shapes, and the odor-control and moisture-management features make it practical for high-output training days or back-to-back runs. VIP Family members can take the Experia X Speed Ultra Light Low Cut Rock for a 90-Day test drive with our Perfect Fit Guarantee."