The yonex mavis 300 yellow shuttlecocks have been skilfully designed by yonex to re create all the fundamentals of a conventional feather shuttlecocks flight and performance but in a much harder wearing plastic shuttle the yonex mavis 300 is one of the best known and popular shuttlecocks that can be found on the market today the shuttlecocks have a natural cork base and come in 2 tubes of 6 shuttles