I rented these shoes @ Zion to hike the entire Narrows trail in Utah.  The shoes are supposed to be lightweight and extra grippy, the best shoes to hike in the river of the Narrows.  The positives of the shoes were that they did seem to do a good job of draining the water and were relatively lightweight for a boot; however the fit was iffy.  Even when I loosened them to the point of allowing pebbles to get in, they were pinching me at the back of my ankles.  This was true too for my friend who has much smaller legs.  But more importantly, the traction wasn't as good as expected. My feet were slipping on the rocks constantly.  By the end, my ankles were swollen from getting twisted in every direction.  It could be that there are no shoes that will actually "stick" to wet, slimy rocks but I had high expectations from reading reviews on various sites.