Tretorn X-Trainer Yellow 6 Doz Bag

If you?re a coach looking for training balls that last longer than any other ball on the marker then the Micro x Trainer balls are definetly for you. Neither pressurised nor permanent pressure, the Tretorn Micro Cellular technology is patented worldwide and recognised by the ITF as the pioneer of a new category of tennis ball. The benefit to you: a highly playable ball that does not lose bounce or performance over time.