The Illinois legislation does not include bioplastics like PHA, defining the banned microplastics to be of the synthetic type.
PHA, on the other hand, is assumed not to cause these issues.
But on a larger scale, companies that buy the beads in large quantities will have to pay more for the PHA in bulk.
PHA, on the other hand, is denser than water, and thus sinks to the bottom.
Havens is optimistic that if PHA beads could be used successfully in cosmetics without losing their ability to scrub.