This is a good replacement for straps. I use them on Vivoactive 3. Others have mentioned that the straps fall out. I didn't have this problem after a few weeks, even after pulling them a bit. I received a black, navy blue, red backpack. The red is a little lighter than I would like; it is not dark red. The difference between small and large is bigger than I expected based on the list. Attached is a picture with a large original strip in the middle and a small one.
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