As I understand it, this model is basically a waterproof version of the Voyageur model. Please note that because they have a built-in waterproof liner, they run 1 size small. I wear a size 13 in the Voyageur so I bought the Targhee II in a 14 and it fit's perfect! I haven't got them wet yet, but I have no doubt that keeping any water well below the ankle line will be fine. Great, comfortable, & supportive shoe.