An outstanding value in a cross country ski boot, the Alpina Action Classic has a lineage from the renowned Alpina classic race shoes that will provide competition level performance in an affordable and comfortable all-around XC ski boot. Zip lace cover and Thinsulate keeps feet warm and dry. The new Alpina sole was designed to enhance the support and comfort Alpina boot are known for. Great for low intensity ski touring, but also a fantastic choice for the exercise or race oriented skier on a budget Proprietary sole integrates with the fit and support Alpina is known for Thinsulate insulation adds warmth Zippered over the ankle lace cover keeps snow out External heel counter adds stability and control Compatible with any NNN, Turnamic, or Prolink binding Alpina Size Chart