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.