All our Glow in the Dark glitter is Polyester. Poly (PET) glitter is more durable and lasts longer. Made from polyester fabric film (which has a plastic base within the fiber), Poly glitter can be used on all kinds of things, both indoors and outdoors. Poly glitter can be subjected to continuous UV light and very high temperatures (350°F), without losing its shine, melting or degrading over time. Glow in the dark Poly glitter will never lose its shine or glow.
