Proton plastic

Proton is the stiffer premium rim material used across MVP, Axiom and Streamline. It carries the same durability as Neutron with less grip in the hand, and MVP positions it as the firmer of the two.

That firmness is the reason players choose it: a Proton disc resists turning over on a hard throw and holds its shape through impacts, at the cost of feeling harder to hold. It sits alongside Neutron as the second of the two main premium options rather than above or below it.