Designed with the exact same specs as the Wilsons AO edition, the Wilson Tour Premier All Court tennis ball offers phenomenal playing characteristics including great bounce, excellent durability and playability due to a unique woven felt fibre. The ball also offers optimal feel on each shot, and provides substantial visibility upgrade with Optivis felt. Furthermore, it has been approved by the International Tennis Federation, and it shipped in bulk as a set of 6 dozen balls.