<p>An add-on armor (10) adapted for protecting a belly (3) of a vehicle (1), the add-on armor (10) comprising a base plate (20) and a plurality of energy absorbing modules (30) fitted to the base plate (20). The arrangement is such that at least a majority of a surface of each energy absorbing module (30) facing the base plate (20) overlaps with the base plate (20) at an area thereof constituting a module zone (MZ). The module zones (MZ) are associated with different modules (30) being spaced from one another by vacancy zones (VZ).</p>
