Abstract: An improved boat hull protector comprises a rod member, a tether and a boat bumper. The rod member is UV resistant and non-abrading and disposable in the fishing rod holders of a boat fender. The rod member includes a countersunk hole through which the tether is looped. The tether is spliced together after looping through the rod hole, and is adjustable. The opposite end of the tether is connected to a boat bumper. To use the invention, the tether is adjusted to dispose the boat bumper between a vessel hull and dock, and the rod member bearing the tether is inserted into a boat rod holder. To remove the device, the rod member can simply be removed from the boat fender and stored as appropriate.