So far they are great! I use my purple on the sneakers to see and make sure it's still there. However, they have a strong magnet and don't usually move, I just made sure of that! lol I use my arms a lot at work and it helps ensure I'm counting real steps and not waving my arms lol. Perfect fit for my Fitbit Flex! I love that I can wash them off when they get dirty! If it breaks, I'll buy again!
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