Castelli Rosso Prologo 15 Men's Cycling Socks (Belgian Blue) Type-Electronic The hydraulic disc sub brake

The hydraulic disc sub brake lever offers reliable and accessible braking in more positions and allows for quick access while riding upright on the tops of the handlebar

Ergonomic knee cut

and stiff one-piece seatpost made from alloy tubing with a 3D forged head for added strength and durability

open system hydraulic

K-Edge has engineered this liner to fail on a significant impact before the tabs on the back of the Sigma break

Castelli Rosso Prologo 15 Men's Cycling Socks (Belgian Blue) Type-Electronic The hydraulic disc sub brakeThe Castelli Rosso Prologo 15 Men's Cycling Socks provide superior comfort and breathability for year round performance. Constructed from high tech nylon and Lycra fabrics, these socks feature a 15 cm cuff and a precise anatomical fit for optimal stability and support. The result? Increased comfort across all types of ride conditions. Features 200 needle construction for added stretch Bioceramic yarns for lasting comfort Underfoot cushioning