The Greensboro 1/4 Crew combines the latest technology with the proven antibacterial benefits of 100% American merino wool, offering precise fit, support, and performance for all kinds of athletic pursuits in a rainbow of colour choices. The quarter-crew cut of this running, biking, and workout-ready sock helps diminish friction at the Achilles' tendon, while its low-profile cushioning absorbs impacts without affecting shoe volume.