The Sidi RR Nix winter road cycling shoes guarantee the best thermal insulation thanks to the Gore-Tex membrane and keep your feet dry and warm ankle-high. The high-quality nylon sole reinforced with carbon fibres has a new look. The optimised carbon fibre content ensures outstanding strength while maintaining comfort throughout the foot area. Alignment scale for optimum positioning of the cleats. Compatible with all standard road bike pedal systems. Nix is an excellent road cycling shoe for those looking for the perfect combination of speed and warmth. These shoes have been designed and carefully crafted for cyclists around the world to enhance the cold weather road cycling experience. The high-tech Gore-Tex PFC free and fleece upper construction provides a sleek and aerodynamic profile, while the stiffness 9 of the sole ensures optimal power transfer with every pedal stroke. The Rotor closure system made of Dyneema ensures a quick and perfect closure and makes the Nix the right choice. Designed to maintain thermal balance High-tech upper construction Waterproof and breathable thanks to Gore-Tex PFC-free membrane Impact-tested high-density dialing system Increased safety thanks to a reflective envelope closure Lightweight and stable wear thanks to the back jump Unleash the power with the R2CC sole, interchangeable inserts and a stiffness index of 9.