The interface between ski and boot is arguably the most important element of an entire ski setup. The world's fastest skis and the world's stiffest, most comfortable boots will do you no good if the connection between them is sloppy, or comes undone easily, or fails to let the skier stand comfortably on the ski. That two binding standards have competed for decades in the nordic industry is evidence of how effectively both systems truly work. Rottefella's Nordic Integrated System (NIS), an extension of the NNN system, provides it's users with ultimate flexibility and user friendliness while the venerable (SNS) Pilot System developed by Salomon boasts efficient power transfer and unmatched ski control. Within each of these systems is a range of designs built to give you the exact balance of performance, ease of use, and durability for whatever type of skiing you do. Salomon has also in 2016 relased a new binding called Prolink which is essentially an NNN binding that says Salomon on it. The prolink binding will fit any NNN soled boot. It is however the only NNN binding that will screw into a ski with out the added weight of the NIS Plate.