First off these sandal be insanely comfortable and wonderfully versatile . by the look of they you would think they be well make and rugged ... and the sole be , the upper however be not . the nylon webbing that look as though it cross at the ankle to provide strength actually stop just under the fake suede and spandex and be only hold on by those 2 row of thread . because of this my pair last less than a week of mixed use on a boat and on land walk 5 mile at most before the heal webbing tear off . if the webbing actually meet and cross in the ankle they would be perfect , unfortunately they choose not to do that . I would call this a design flaw but it be clearly do on purpose though I can not imagine save 1 inch of nylon webbing would make or break the cost of the sandal . at least the return policy be great , there be absolutely no problem get my money back , customer service be wonderful .