Amazfit Watch faces

What straps do you use on your BIP?

You can use any 20mm strap. I've tried different types and colors:
It looks very cool with a 'black leather with white stitches', very dressy.
black and grey (bond style) also look great
'leather brown strap' is a bit ugly and doesn't match very well with the black face of the watch.
I have tried too a few NATO straps, very comfortable but the problem with those is that there is a piece of nylon under the watch blocking the heart rate sensor.

I also use nato looks strap but it is two pieces so it wont block the heart rate sensor.
Looking forward to buy brown leather strap as my Bip is black