The thread I used was basic embroidery floss. I can see how proper sashiko thread would give a superior result, though, as it’s not plied and wouldn’t split.
Once I had built up this fabric I trimmed it to neat rectangles and made a tote bag. I was inspired by this site. I used more denim from jeans for the handles.
The patches and lining are made from the fabric left over from the tunic top I made recently. There’s a magnetic snap and D ring tab inside.
I love it!