I've purchase many pairs of Olukai sandals over the past few years.  They are the only sandal I wear and usually spend about 5 months a year wearing nothing but sandals. I've also recommend this brand of sandal to friends. Unfortunately I must report that I believe that as Olukai as a company got bigger and more well known, they started using different products / materials to produce their product.  This is the 2nd pair now where the sole is delaminating. This particular pair I have only worn less than a month.  I did return a pair a few years ago for similar reason. The customer support at Olukai replaced that pair, but kind of a hassle since you have to box them up and send them back to Hawaii.  I hope that Olukai will pay attention to the reviews their customers are making about the craftsmanship of their product and go back to constructing them the way they used to.