Works. They fit. I haven't had a single break from working with Fitbit, which is amazing to me. But they are rigid and accidentally torn to pieces. I just broke two of them around the middle of my wrist for no apparent reason, I think if they get hurt they will break. But hey, they are so stiff both times that I noticed that they came loose instead of just falling and losing my seat! Honestly, for the price they are ok. However, I've replaced at least 3 straps like this in the last 18 months or so after my original Fitbit strap snapped (no longer strapped to my Fitbit, I don't know why, I've never unbuckled it) so they don't last long. You get 3 for about $10, but every time it breaks, that's another chance you'll lose a Fitbit.
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