Senston Badminton Ball Shuttlecocks Goose Feather Shuttlecocks Badminton Birdies High Stability Durability Badminton Ball Material: Solid Cork/Goose Feathers Bright color and cool design Excellent stability performance,high quality goose feather also provide great durability 3 dozen per package, 12 piece per dozen In order to improve the service life of the badminton in the low temperature or dry climate, you can increase the humidity of the feathers by some water vapor before playing, but do not spray some hot water to the feather pieces