when starch is not enough
This is exactly what I wanted - I needed cotton, flexible, but shape supporting stabilizer for some funky corners with bias. Bonus that it was iron on and stayed in place - again firm, but flexible. It worked great to keep things from stretching while I sewed them together - it also kept the piecing precise, crisp and easier to handle. It is lightweight enough it didn't add bulk or stiffness to my project.
Note: used it with waxed cotton ankara fabric