The Alpina Touring Combi is a great binding that is designed to slide on Cross Country skis that already have a NIS (Nordic Integrated System) plate on them. NIS plates allow your skis to have an even and deep flex over small hills and rollers that you may encounter on the groomed trails. This binding is only compatible with skis that already have NIS Plates on them, and only compatible with NNN Boots. This Binding is only Compatible with NIS Skis that already have the NIS Plate Attached, This Binding is Only Compatible with NNN XC Boots, Warranty: One Year, Gender: Adult, Ski Gear Intended Use: Cross Country, Boot Compatibility: NIS (NNN), Skill Range: Beginner - Advanced Intermediate, Model Year: 2022, Product ID: 253310, Model Number: I10200196, GTIN: 7036370002323