Tretorn Micro-X (Yellow) Pressureless Tennis Balls (Bag of 72 Balls)

Glad to see that Tretorn still makes tennis balls. These are pressureless balls, which means that they have a slightly different bounce than the balls most people use to play a match. But they're ideal for using with a ball machine or practicing your serve. In my experience, they actually last for years and maintain the same bounce that they had when they were new. So as long as you know what you're buying them for (a ball machine or service practice rather than for match play), you can't go wrong with these. I've used other pressureless balls as well, but these have lasted longer and maintained their bounce better.

This is probably my third batch of Tretorn pressureless balls, and I keep coming back for a reason. I use them in my ball machine, and they’re unmatched for consistent bounce and extreme durability. I even tested them against brand-new pressurized Penn balls—bounce and weight were nearly identical. The only difference is a slightly louder pop off the racket. For machine practice, these are perfect. Nothing matches the quality or longevity of Tretorn.

These are fine. The package included some flat ones. But generally acceptable for upper-intermediate-advanced training with ball machine. The higher price commensurate with the higher life of the balls. Pressureless balls feel a bit different from regular balls.

a little heavy compared to normal balls but bounce well and last a long time.

Bought these to use with my Wilson Ball Machine, and they are great. Have had them for almost a year, and they really hold up. The sound is slightly different than what you'ed get with pressurized balls, but I didn't mind at all. If you're using them with a ball machine, would recommend to wear them out a bit first as, like all balls, they have a bit of a waxy finish that can make your launching wheels loose grip. You can fix that by sanding the wheels afterwards, but best to avoid all together.