Cross country skiing is fun...It's also easy to learn, healthy, family friendly, accessible, affordable, and offers great variety! Construction(3): Cap technology ski (1) 1. ABS 2. Thickening material: Phliselinum 3. Glassfiber lamina 4. Aspen, birch and needle 5. Air channels 6. Aspen, birch and needel 7. Glassfiber lamina 8. Polythylene base Wood-plastic skis with rubber fixing (2) 1. Glassfiber lamina |2. Polyethylene layer 3. Veneer layer 4. Aspen, birch and needle 5. Air channels 6. Glassfiber lamina 7. High molecular polyethylene base Wooden-plastic skis (3) 1. ABS 2. Glassfiber lamina 3. Aspen, birch and needle 4. Air channels 5. Birch veneer sheet 6. Glassfiber lamina 7. Polyethylene base