Description The players' choice! Extra duty advanced flocking process promotes longer wear and provides the perfect texture for maximum ball spin and control. Proven rubber compound provides the softest feel and most consistent bounce.APTA Approved 6 x 2 ball sleeves (12 balls total) 2 Reviews 2 Reviews Add Review New Viking Platform Tennis Balls Oct 29th 2021 Kyle Bast 1 80% of the cover was gone after a single set in 100% dry conditions. Xenon ball lasted 3 more sets with maybe 20% off the cover. Very disappointed in this new Viking release. Balls Oct 20th 2021 Steve French 1 Very very poor quality first one I used only lasted one set WTF!