Salomon's RS8 Prolink Skate Boot is a comfier option than the Nordic boots in Salomon's Race Series, making it an ideal option for training and everyday performance. It still provides a race-specific flex like S/Race models, except there's more SensiFit around the upper to conform to your foot more comfortably. Features specific to the RS8 include an Energyzer collar that provides progressive lateral support for better energy at each step, and the 3D Advanced Chassis drastically increases stiffness without adding weight. This boot is compatible with any NNN or Prolink cross country ski bindings.