1. Material: nylon, 304 stainless steel, aluminum alloy 2. Plate type: directional 3. Number of boards: double board 4. Holder size: adjustable 5. Turning radius: 10cm 6. The metal buckle is made of aviation aluminum alloy, which is sturdy and durable 7. The sole is upgraded and can be used at minus 200 degrees Celsius 8. The shoe cover strap increases the leather interlayer and locks it firmly 9. Specification: 40cm 10. Net weight: 1.55kg