The X-3 from Rossignol is a fantastic option for the experienced cross country skier looking for stability and control while gliding on the groomed tracks or doing some light off-trail skiing. An External Frame adds additional ankle support and energy transmission towards your skis. Rossi's new Touring Sole is only compatible with NNN binding systems and offers better traction on slippery surfaces when you are walking to your track. Polyester Insulation in the Thermo Adjustable Fit Liner keeps you warm with a personalized fit. Thermo Adjustable Liner, Polyester Insulation, New Touring Sole, 1100g, ONLY COMPATIBLE WITH NNN BINDINGS, Warranty: One Year, XC Ski Best Use: Groomed/Ungroomed, Compatible Binding System: NNN, External Frame: Yes, Covered Laces: Yes, Insulation Material: Polyester, Ski Gear Intended Use: Cross Country, Support: On Trail Performance, Warmth: Warmer, Skill Range: Intermediate - Advanced, Model Year: 2019, Product ID: 518841, Shipping Restriction: This item is not available for shipment outside of the United States., Model Number: RIHW150.420, GTIN: 3607682469568