In 1955 Tretorn changed the history of tennis when introduced and patented permanent pressure or pressureless tennis balls. These provided solutions to the on-going problems with loss of pressure, bounce and inconsistent playability and performance over time. Today, Tretorn pressureless balls are the most advanced and playable in the world. Engineered with Tretorn’s exclusive rubber core formula and technology our pressureless balls provides the player with a superior combination of playability and durability.
Like micro cell balls, these are also unaffected by altitude and temperatues and hence also perform excellent in colder climate conditions and at higher altitudes.