Have water shoes bought for our vacation at the Ceze, a river with some sharp rocks of different sizes. The first tightening the cord had broken tightening because it probably was not sewn correctly already on a shoe. Regardless of the mechanical stress bonding of insoles had adopted on the first day. After two weeks, the upper material had several small holes, so I had to dispose of the shoes on the spot. Next time I'll certainly try a different model.