Tretorn's Micro X ball is approved by the USTA and performs like a tournament ball making it ideal for advanced players. It offers unsurpassed feel, playability and wear-resistance through micro cellular technology.
Micro X balls have a consistent bounce making them great for ball machines.
Micro Cellular Technology: Neither pressurized nor permanent pressure™, Tretorn's micro cellular technology is patented worldwide and recognized by the ITF as the pioneer of a new category of tennis ball. The result is a highly playable tennis ball that does not lose performance over time.
A conventional pressurized ball flattens on the stringbed as it is hit and resistance is provided by the compressed air within the ball. A small amount of air escapes each time the ball is struck, reducing air pressure and performance. With this new category of ball, 700 million air-filled micro cells take the place of compressed air. These cells cannot escape through the ball's rubber core, resulting in a ball that never loses its bounce.
The rubber core, made of titanium and polybutadiene, has a softer feel than permanent pressure balls, enhancing spin. Surfaced with Tretorn's exclusive Flex-Felt™, which is specially designed from wool and polyester fibers, the Micro X offers unsurpassed feel, playability ad wear-resistance.