Most skin safe glitters are PET plastic based and do not break down in the environment having an adverse effect on marine wildlife. EnviroGlitter™ powders have no adverse effects since they are based on minerals. They are also vegan and cruelty-free! Mermaid Treasures is the first soap I have made using this product. I am well pleased. Each soap tail has been hand brushed with glitter. This soap is very mild and has a nice clean scent!