"To go fast, a boat must balance lightness with power. These two concepts, often contradictory, can be combined thanks to the foils," Vincent Lauriot-Prévost, one of the architects, says. "The foils make it possible to create dynamic power and thus lighten the boat. Although lifted, an IMOCA equipped with foils does not literally fly, and is not more powerful, but it sails in a more aerial way, with less wetted surface and therefore less drag. Hence there is a significant gain in speed at certain angles."