The Fischer XC Comfort Pro is an awesome option for beginner to advanced intermediate cross country skiers who want a functional, performance filled boot for the trails. Feet stay warm and dry thanks to the combination of Comfort Guard Insulation and Triple F Membrane for more enjoyable cross country trip. Thermo Fit gives you the option for heat molding the foam liner to your foot after taking it to a qualified ski shop. Fischer Speed Lock laces make lacing your boots up quick and will get you on the trails in a matter of seconds. Keep your feet warm and comfortable with performance in mind with the Fischer XC Comfort Pro. Compatible with Turnamic, NNN, and Prolink Bindings, Fischer Fresh- Helps avoid nasty odors for fresh boots all the time., Fischer Speed Lock- A quick and easy lace system with just a pull of the toggle., Thermo Fit- Allows you to heat treat the foam cushioning for a custom fit that delivers maximum comfort., Triple F Membrane- Ensures the inside of the boots remain dry and warm., Comfort Guard- A lightweight and water repellent insulation to help keep feet toasty warm and dry., Warranty: One Year, XC Ski Best Use: Groomed/Ungroomed, Compatible Binding System: NNN, External Frame: No, Covered Laces: Yes, Insulation Material: Comfort Guard Insulation, Ski Gear Intended Use: Cross Country, Support: On Trail Recreational, Warmth: Warmer, Skill Range: Beginner - Advanced Intermediate, Model Year: 2022, Product ID: 616835, Model Number: S20720-41, GTIN: 9002972502934