Sensitivity is one of the strongest attributes of Air Rotor. The rotor is made from a highly sensitive, high-density carbon resin called Zaion. Zaion is a new material, composed of carbon resin and long carbon fibres. This high-density material is light, strong and resists corrosion. Used in many of Daiwa's reels, it far exceeds the strength of magnesium in a strength per unit weight comparison.