Features: 1. Made of good quality duck feathers, treated with special formula, smooth and soft. 2. The feather hair straight and thick, good strength, enhance the badminton resistance. 3. The ball head adopts advanced cork technology, and the sound of hitting the ball is very crisp, which is beneficial to stimulate the players to enter the competitive state quickly. 4. Resistant to hitting, not easy to break, enduring for long life time. 5. Perfect for beginners and amateurs training. Specifications: Material: Duck Feather + Foam (Head) Color: White Packing List: 12 * Badminton Ball (One Barrel) Badminton Caring Method: 1. The most common, but also the most used: fumigation, open the badminton barrel's cover on one side, put at the humidifier air outlet, fumigate for 30 seconds-1 minute or so. Without a humidifier, you can use a boiling kettle as well. This is the most maneuverable and used method. 2. Pour water directly into the barrel, cover the lid, and shake it up and down so that each ball is wet and ready to use. This method is more direct, the amount of water is not easy to master, novice don't use better. In general, using this treatment of badminton will improve the playing resistance.