The box label said it was

I love these belts the metal loop insert color doesn’t match the main belt or the belt buckle in color

I didnt test it eg melting or chewing or i dont care my last white plastic belt lasted for years looks great fits all trousers and matches most

Cutting the strap to length revealed a fibrous core like felt sandwiched between two very thin layers less than a mm of shiny white substance which looked white all the way through