The Rossignol X-1 FW is a great option for the beginner to intermediate cross country skier who will be using an NNN binding system and skiing exclusively on the groomed tracks. Polyester Insulation keeps you warm when you are out gliding through the woods. A new Touring Sole offers you better traction while walking to the trail. New Touring Sole, Polyester Insulation, 980g, ONLY COMPATIBLE WITH NNN BINDINGS, Warranty: One Year, XC Ski Best Use: Groomed, Compatible Binding System: NNN, External Frame: No, Covered Laces: No, Insulation Material: Polyester, Ski Gear Intended Use: Cross Country, Support: On Trail Recreational, Warmth: Warm, Skill Range: Beginner - Intermediate, Model Year: 2019, Product ID: 518848, Shipping Restriction: This item is not available for shipment outside of the United States., Model Number: RIHW410.350, GTIN: 3607682470151