Castelli Fast Feet 4 Sock Variant:Castelli Sock Fast Feet 4 Black - L/XL Pressure reducing surface

Pressure reducing surface

For regular shifting both grips are the same length

The ACTIV GRIP Trail pads are compatible with our TRAIL Grip platform pedals

Bits and Sockets Set

Made in nylon glass fibre reinforced

Castelli Fast Feet 4 Sock Variant:Castelli Sock Fast Feet 4 Black - L/XL Pressure reducing surfaceFor road racing or when you can't wear a Fast Feet TT Shoecover, this sock saves watts. PRODUCT FEATURES Castelli's Fast Feet project for maximum aerodynamics Foot portion based on Castelli Rosso Corsa Sock for in shoe comfort Polyurethane grip strip at top to keep sock in place Leg portion constructed with engineered grooved Lycra to help detach airflow TECHNICAL FEATURES Insulation 1 5 Waterproofness 1 5 Windproofness 1 5 Breathability 4 5 Lightness