What are your favorite plugs made out of?

My fave material for most plugs is quartz but glass is also super comfortable

Acrylic & metal seem to do fine in my ears.

I love my opellite and jade plugs. Natural stone is my favorite.

Glass

My favorite type of plug material is wood because my ears have never had any issue with wooden plugs, whereas my ears have had some really adverse reactions to other materials like acrylic