s done a complete re-design of their popular Zero G boot line, and the Zero G Tour W Alpine Touring Ski Boots lead the charge on the women's side with lighter weight, a better walk mode, and surprisingly increased stiffness for the descent. They accomplish all this with a full time ISO 9523 Vibram sole, a new walk mode lever with two engagement points, and redesigned ultralight magnesium buckles, among other things. Bottom line: The Zero G Tour W has become less of a "crossover" boot and morphed into a true touring boot that happens to ski really really, really well.