Please keep in mind that some Bosses can damage through shields that are 100 percent mitigation of a certain type, so 100 percent does not guarantee zero damage received.
The values listed in the tables below represent the percentage of damage blocked when blocking an attack with said shield. All players can use Class 0 Shields but you must put points into the Shields Skill in order to be able to use their higher Classed counterparts. Shields in Salt and Sanctuary are typically carried by trained swordsmen skilled in agile fighting.