NNN boots have a single bar at the toe and two channels that line up with corresponding ridges on the binding. NNN BC boots have the same configuration, but with a thicker bar and wider, deeper channels. NNN boots and NNN BC boots are not compatible with the same bindings!Salomon Nordic System boots come in two different options: Profil and Pilot (the backcountry variant of SNS, X-ADV, was retired in 2015). All SNS boots have a bar at the toe and a single channel along the sole of the boot. SNS Profil boots have one bar, while SNS Pilot boots have two-one at the toe and one at the ball of the foot. SNS Profil and SNS Pilot boots are not compatible with the same bindings! THANK YOU FOR SHOPPING WITH US! The item "SALOMON Vitane 8CL Cross Country Ski Boots Size EU40 2/3 SNS Pilot" is in sale since Monday, July 5, 2021. This item is in the category "Sport\Wintersport\Skifahren, Snowboarden & Schneeschuhwandern\Schuhe & Boots\Herrenschuhe & -boots". The seller is "2nd_value" and is located in Vilnius. This item can be shipped worldwide.