Abstract: A rub rail system for a vessel including a rigid track extrusion attached to a vessel, a resilient flexible fender extrusion, and a shock absorbing inner core. The inner core is disposed in the fender extrusion and the core is substantially softer than the fender extrusion. The fender extrusion is configured to matingly engage the track extrusion. The fender extrusion has an upper barb engaging an upper receiving cavity of the track extrusion and a lower barb engaging a lower receiving cavity of the track extrusion. The track extrusion has an upper tang engaging an upper recess of the fender extrusion and a lower tang engaging a lower recess of the fender extrusion. The track extrusion also includes an upper lip configured to engage a top portion of the perimeter of the vessel and a lower lip configured to engage a lower portion of the perimeter of the vessel.