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Description:
USTA Approved and the official ball of the Nike Junior Tour in Europe.
Tretorn's micro cellular technology is patented worldwide and recognized by the International Tennis Federation (ITF) as the pioneer in a new category of tennis balls called "micro cell." Tretorn's micro cell tennis ball, the Micro X, is neither pressurized nor pressureless. The Micro X ball combines the best of both worlds, resulting in a tour performance ball that does not lose bounce or performance over time.
When a conventional ball is hit, it flattens on the strings and resistance is provided by the compressed air within the ball. Every time the ball is struck a small amount of air escapes, reducing ball pressure. In the case of Tretorn's Micro X ball, the resistance is provided by 700 million air-filled micro cells that cannot escape through the ball's rubber core, resulting in a ball that never loses performance.
Each Micro X ball is surfaced with Tretorn's exclusive Flex-Felt™, which provides superior playability and wear-resistance. Tretorn Flex-Felt™ is a specially designed woven felt, made from wool and polyester fibres, offering a unique flexibility. This flexibility is critical in protecting the soft and playable rubber core, and offers unsurpassed feel and exceptional durability.