This pack consists of 12 pieces of shuttlecocks Speed: Medium Colour: White Feather Type: Feather The crown is made of duck feathers, which provides good projectile and faster recovery. It uses top grade Duck feathers to create a good durable and smooth flight. Perfect for club matches. YONEX AEROSENSA Shuttlecocks are the official shuttlecock for the world's leading international tournaments. The precisely engineered technology in every lightweight YONEX Feather Shuttlecock is extensively checked and tested to guarantee consistent performance.