New Flypower badminton shuttlecocks "RED" (12 pieces per box). 2 boxes - Brand: Flypower Quoted from the official website: Feather material: Waterfowl Cork material: Natural cork 50%, Polyurethane 50% SPEED 79: A shuttlecock with stable flight throughout the year in environments that are not too hot or too cold. This is the best choice if the temperature is above 10 degrees Celsius even in winter. SPEED 80: A shuttlecock that is stable in Japan during the cold months of January and February, when temperatures are near freezing (when the air density is high and it is difficult to hit). Country of manufacture: Indonesia