The part that holds the strap breaks very easily. I think that's why I bought various packaging so I don't have to order again right away. I can't find a replacement for a bracelet that won't break. My kids wear them and we basically have to throw them out every time one of the strap holder parts breaks. I would say they will break in a couple of weeks. My kids wear them 24 hours a day, 7 days a week so they're not constantly taking them off, playing, or fiddling with the strap.
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