Alpina Racing Classic Men's Cross Country Ski Boots. Alpina fitted this boot with their newest development, the original Alpina sole, and installed it with the 4DRY breathable system. The inside lining is insulated with Thinsulate material that deters water and keeps the foot dry.If you are looking for comfort and performance, this boot is a necessary addition to your gear box. Best Use : Cross Country Skiing. Boot and Binding Compatibility : NNN, TURNAMIC, Prolink.