I like the tricot (knit) fusible. It gives it a nice weight with out being heavy. BUT ...once you quilt it, the ONLY person who will know what fusible you used is...YOU! No Quilt Police are going to come and take your quilt apart, only to give you a citation of fusible non-compliance. :-D Try a piece of a knit and what ever you have and see which one you like better.