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Created by YONEX in 1980, the ISOMETRIC head shape is a unique and evolutionary breakthrough technology in tennis racquet design.

A tennis racquets sweet spot is found where the vertical and horizontal strings meet. The YONEX ISOMETRIC head shape increases the size of the cross-section of strings, creating a greater sweet spot with a 7%* more effective hitting area than conventional round headed racquets.

For example, when compared to a larger 95sq inch conventional round head racquet, the smaller, more compact 89sq inch YONEX frames generated the same size sweet spot – a key advantage in any player’s game.

*Tested by YONEX