Fast young cross-country skiers will feel faster wearing the famous Alpina red on their feet. The Alpina Elite 3.0 Duathlon boot will not only make them feel fast, but it will also boost their skiing performance. The sole flex is silky smooth to enhance classic ski striding, and the carbon injected support frame and skate cuff offer outstanding stability and power for skating. Duathlon Junior ski boot has outstanding performance for skate and classic skiing Carbon injected frame and cuff is stiffer and lighter than previous generations Alpina 4DRY fabric outer is waterproof and breathable Boot is compatible with NNN, Prolink, or Turnamic bindings Alpina Junior Boot Size Chart EU Sizing US Kids