otherwise resilient fingers 98 which are preferably slanted inward of the shell 94 to provide a u201c one way u201d attachment of the mat 90 to the hard armor 12 the fingers 98 preferably fold down as the shell 94 is inserted over the trailing edge 96 of the hard armor 12 yet are biased upward to wedge the shell 94 and the mat 90 against inadvertent dislodgement of the shell 94 from the hard armor 12 still another alternative embodiment of the present invention is shown generally as 100 in fig8 as shown in fig8 the mat 100 is curved near its leading edge 102 and coupled via a slip end lock system 104 such as that described and secured to a drainage pipe 106 such as those known in the art as shown in fig8 the mat 100 flattens outward as it extends over the soft armor 14 the mat is provided with a riser 108 and a plurality of voids 110 in a manner such as that described above by following the contour of the drainage pipe 106 at the leading edge 102 and flattening toward its trailing edge 112 the mat 100 protects the soft armor 14 from scour associated with the erosive effects of the effluent 30 at the point where the soft armor 14 meets the drainage pipe 106 yet another alternative embodiment of.