yonex as-10 shuttlecocks (1 tube (12 shuttles)) yonex 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. these high standards are the reason that yonex feather shuttlecocks are the official choice of the london 2012 olympic games.