X Line is Discraft’s baseline for drivers and mids: opaque, grippy, and inexpensive. It’s the Discraft equivalent of Innova DX.
Baseline plastic is for beat-in. X Line moulds move over a season, and seventeen are listed here, so it’s the cheap way into most of the Discraft range.
It won’t hold flight and it scuffs. For durability the Discraft answer is Z, and for grip with lifespan it’s ESP.