
I've been watching Revain for hours. Most replacement bands were the same size as this one. If you take both sides of this strap and discard them from the factory polars I had to replace, they are an inch shorter. They barely fit my wrist and I don't have large wrists. My factory strap that came with the watch is torn on the side with holes. Fortunately, the other side holds up longer. If I had to replace both sides I wouldn't be able to wear it as it would be too short. I had to fiddle around a bit to get the pins and holes together, but it wasn't too bad. I'm just really disappointed that nobody makes replacement straps the same size as the ones on my watch. I wish Polar would sell interchangeable wristbands. Based on the fit of this replacement, I'll probably just have to get a brand new fitness tracker as my old strap ripped and fell apart and I can't find the right size. I'm only using this in the meantime and hope it works because I won't lose another $150 just because I can't find a replacement for the size of the one that came with it. FYI, I really like the Polar M400 device too, but next time I'd argue about another brand because something as simple as a torn strap will result in you buying a new device as Polar doesn't sell a replacement (which I can find) and the ones you find here are too short and don't work.

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