Castelli Fast Feet 3 Socks Variant:Castelli Sock Fast Feet 3 Black - 2XL injecting a foam of Caffélatex

injecting a foam of Caffélatex through Presta valves

Quad-blend electrolytes - Our ‘quad-blend’ electrolyte mix perfectly mimics the ratio of electrolytes in sweat with added sodium for endurance sports

For this reason - also with Tyreinvader - we recommend to slightly increase the quantity of sealant normally employed

Ideal prevention from occasional theft

and comfortable

Castelli Fast Feet 3 Socks Variant:Castelli Sock Fast Feet 3 Black - 2XL injecting a foam of CaffélatexFor road racing or when you can't wear a Fast Feet TT Shoecover, this sock saves watts. Castelli's Fast Feet project for riding in warm conditions The foot portion is based on the 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