Only worn a few times. A maximally-cushioned road shoe designed to go the distance, the Bondi X is spring-loaded with a propulsive carbon fiber plate. The original Bondi cushioning and lines are here, providing the soft, balanced ride for which the franchise is known. The Bondi X fine-tunes the geometry with an extended rocker for greater acceleration, while the carbon fiber plate is designed to provide an efficient transition and smooth toe-off.