The instructions for the Bendy Bag were very clear with lots of diagrams and photos. Ideally, the fabric shouldn't really be directional as the pattern is turned 90 degrees. Only 2 coordinating fat quarters are required plus fusible batting.
I selected the fabrics from my fat quarter stash. It didn't take very long to make the bag.
The cut off pieces were quite large which seemed to me to be a waste of two padded, lined, triangles.