Neutron is MVP’s flagship plastic, opaque and grippy, and it’s shared across MVP, Axiom, and Streamline. Seventy-six moulds are listed in it, the most of any plastic on this site.
That’s the all-conditions MVP plastic. It keeps grip when wet, stays workable in the cold, and holds flight for a long time. Cosmic Neutron is the same plastic with a swirled colour. Innova Star is the plastic to compare it to.
It’s a step below Proton on lifespan and it beats in a little faster. For a mould you want to keep overstable, Proton is the answer.