My son had the original strap for his Vivofit Jr 2 for about a year and a half before it wore out. I bought them as a replacement. The material is quite nice (my son doesn't like that I think) and they seem pretty sturdy. The downside is the size. They are significantly smaller than the original band, currently he uses them on the very last hole which is not very reliable so he doesn't even wear them most of the time. (I should add that he's a skinny kid, his wrists aren't very big, and he only had half the holes in the original strap.)
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