I bought these for my Inspire 2 and they fit, although not snugly. I don't think they're loose enough to fall off, but they're definitely not as tight as the Fitbit straps. I noticed that the pens they give you (you get two sets of pens - 4 total) are a bit thinner than the Fitbit pens, which might explain the loosening. The colors are beautiful (I bought a set of pink/pink flowers) and match the picture. They are very nice and thin and while they are nice and great for everyday use I wouldn't trust them for heavy training.
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