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Mark (San Francisco, US) Hello, I bought the Koa wood iPhone watch band while on vacation in Kauai, and found over the next few days that the clasp kept coming undone. I waited until I got home and had the band resized to fit better hoping that would help. When it did not, I called the jewelry shop who referred me to the Pono website. From that point everything was automated and easy, and I now have a beautiful replacement bad that fits great and stays clasped. Mahalo!