The Swiftwick ASPIRE Four Stripe Sport Socks are lightweight socks with firm compression and a breathable design that is perfect for cycling and running. The thin, light cushion provides a responsive feel while the contoured compression stabilizes muscles and reduces fatigue. Lightweight Olefin wicks moisture and thin channeled upper provides ventilation. Swiftwick's most popular cycling sock. The Four's Quarter Crew height sits below the calf and its double-cuff construction provides extra support for cycling and trail running.