I got these bands to use with my Fitbit Sense because the original band was pretty worn and didn't look so great. These are basically exactly like the original band in terms of fit, flexibly, and how well they attach. At first, I was most concerned that an off-brand band might fall off or be rigid, but these are perfect. The end where it attaches to the Sense is identical to the original band. With the perforations, they're actually more breathable and comfortable than the original. The "clasp" part is metal and stays in place well (it doesn't pop out randomly). Since the clasp pops into the perforations, which cover more of the band, they provide for a more precise fit than the original. Also, the color and design is very modern, which I like. I got the small size pack, since that's the size of the original band that I used, and they fit perfectly. I highly recommend these bands as replacements or if you're just looking to add variety. Great value for the price. I only took pics of the navy band, since that's the one I've been using (I really like the contrast), but there are 4 different color bands in the set.
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