Use for kayaking, they are SUPER comfy, I didnhave to drill the holes in the sole (they are there marked but not drilled, it was super easy, kinda entertaining to do actually).They drain so fast that after getting them soaked i kept them on whilst on the kayak for over 3 hours, feet didn't get macerated (white wrinkly skin). I think they would tare easily if stuck on sharp rocks (other than the sole, that holds, i know for fact)