High-Performance Aero Racing Socks Part of Shimano's flagship racing line, these professional-grade cycling socks are the choice when every second counts. Key features include enhanced arch and heel support for more secure and stable pedaling, and a breathable mesh instep that helps vent heat from the shoe. Features Part of SHIMANO's flagship racing line, these updated professional-grade, mid-calf aero socks are designed for high-speed racing and riding Wind Cheating: Thin knitted ribs and mid-calf length maximize aerodynamics, helping you maintain top speed Efficient and Comfortable: Enhanced arch and heel support secure feet for stable pedaling, while breathable mesh instep helps vent heat from shoe Color Options: Available in Black, Blue, and White to perfectly match your preferred Shimano S-PHYRE cycling shoes Environmentally Friendly: Constructed from 72% recycled polyester yarn which lessens environmental impact during manufacturing and at the end of the product cycle High-Grade Construction Made from 72% recycled polyester yarn, these comfortable and durable socks feature enhanced arch and heel support for more secure and stable pedaling, a breathable mesh instep that vents heat from shoe, and reinforced ribbed heel for improved durability. Speed Enhancing Narrow knit ribs deliver maximum aerodynamic efficiency, while thin sole construction creates a more direct connection with the shoe, ensuring efficient power transfer so you can maintain top speed when every second counts.