Elastic aerodynamic fabric on the legs with vertical grooves that reduce air resistance. Seamlessly adapts to RC and other racing shoes, ensuring no gaps, bumps, or wrinkles from the calf to the instep. PU-coated stretch fabric made from 48% recycled polyester provides a smooth, aerodynamic surface on the foot. The pronounced heel pattern supports natural heel movement and highlights the stylish S-PHYRE RC9 heel cap. UCI-compliant waistband height. (Note: Actual waistband height may vary depending on the rider.)