Race-proven power. The Hero World Cup ZJ+ is a full-gas, elite-level race boot for competitive alpine racers. It features a 92+mm last plug shell with extra-thick walls and a race-hinged design for the most efficient power transmission available in skiing. A neutral, upright stance complements the narrow build to emphasize power and edge control, while the ultra-thin cork-flo lace-up liner delivers an exact fit and unprecedented precision on snow.