Royal is Mint’s baseline putter plastic, moulded by Prodigy, and it comes in Soft, Medium, and Firm runs. Mint sells it on grip above the premium blends, and eight moulds are listed in it.
That’s the range to pick a putter feel from. Firm for a consistent release, Soft for a dead landing, Medium in between. It’s the Mint equivalent of Innova DX or Dynamic Discs Prime.
It wears the way baseline plastics do, and it isn’t a driver plastic.