The GT4 Feather Shuttlecock is the entry level feather shuttle from Carlton that is an excellent cost saving alternative to the other models in the series. Perfect for recreational or club use, the Carlton GT4 Feather Shuttlecock offers excellent toughness and is made using premium density cork and high-grade duck feather for unswerving flight and trajectory. On a test, the Carlton GT4 Feather Shuttlecock produces a consistent and accurate flight and superb consistent performance time and again.Carlton GT-4 (GT4) shuttlecocks are practice grade feather shuttlecock. The Carlton GT-4 (GT4) is perfect for the club looking for inexpensive shuttlecock for training, practice, and club play. To prolong the durability of the shuttlecocks, we highly recommend that all shuttlecocks be humidified 24-48 hours before usage. This will help increase the life/durability of the shuttlecock by up to 70%. Entry level feather shuttle. Excellent cost-saving alternative. Perfect for recreational or club use. Premium density cork. High-grade duck feather. Carlton quality assured.