http://breezewiki.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion/minecraft/wiki/Armor
Using this method, a player could give themselves, for example, a full set of diamond armor with a Protection V enchantment on every piece. Following the algorithm above, we find that, because Protection V has an EPF of 5, the armor reaches the maximum EPF of 20 for all types of damage.