The Shimano S-Phyre Flash Socks are professional-grade, mid-calf aero cycling socks engineered for high-speed racing within Shimano’s flagship S-Phyre line. Designed to reduce drag, their thin knitted ribs and taller cuff profile enhance aerodynamics, helping riders maintain peak speed. For optimal pedaling efficiency, they feature reinforced arch and heel support, while a breathable mesh instep aids in heat dissipation from the shoe. Constructed from 72% recycled polyester, these socks also align with Shimano’s sustainability efforts, reducing environmental impact during production and throughout the product lifecycle. Available in Black, Blue, and White, they are designed to match seamlessly with S-Phyre cycling shoes for a unified, race-ready look.