The listing on the Amazon is named “MI cosa Black and Blue Combo (only for mi Band 3, 3i and 4) Adjustable Xiaomi Mi Band 3/ Mi Band 4 Watchband Silicone Strap”
I ordered black and navy blue combo. Earlier from another seller I had ordered the navy blue one but color of the band delivered was not navy blue but was dark blue with purple tinge.
This is had a perfect color. As I was expecting. The material of the strap is soft just like the original Mi band strap.
Black version had a matte finish comapred to original Mi band strap having aslightly shiny look.
Overall an excellent product and a total value for money.
Link to buy https://amzn.to/3cQoODV