the wristband fits perfectly on the Xiaomi Mi Band 3. It gets tight and stays snugly over time.The material seems to be remarkably similar to the original one provided in the box. I have been using it for the past 7 days, and I haven't felt any allergies or any funky odors from normal usage, doing sports, taking it for a swim, etc.The only minor things clients should be aware of is that the central lateral part where the watch fits seem to be slightly thinner and more fragile than the original ones. I don't think this will pose any significant issues, but it may be something to consider while it ages. The other aspect one should be aware of is that the camouflage print sometimes seems to be slightly blurred which is probably due to the application of the different color tones. If you are considering clear and razor-sharp patterns, you may be a bit disappointed.Overall, 4 out of 5.