Prism is the Axiom-only plastic in the MVP family: a Proton rim with a variable core, so the flight plate colour changes while the rim stays clear. It shares Proton’s durability.
That makes it Proton with an Axiom look: durable, stiff in the cold, slick when wet. Four Axiom moulds are listed in it.
It’s Axiom-exclusive, so you won’t find MVP or Streamline moulds in it.