Swiftwick Aspire Quarter Crew Socks - 4" Red MediumSwiftwick Aspire Four Socks Red Medium. A firm compression sock with a solid four inches of ankle support for cycling running and any other endurance sport. Firm compression provides contoured support and prevents bunching Lightweight Olefn fber in a minimum cushion design is cool wicks moisture and dries quickly to keep you performing at your best Y Heel contour creates a contoured heel pocket that moves with the foot Virtually invisible toe seam