Abstract: This invention consists of a flexible type of concrete guard against the erosion of soil by flowing waters and wave action. It consists of rows of comparatively small, identical concrete blocks which form rectangular sections which are placed upon the ground surface which has previously been covered with a filter cloth. The said blocks are held together by a continuous wire cable which is embedded centrally in each block, and which passes through each row of blocks, forming a small loop as it leaves one of said rows to enter its next adjacent row, by means of which one section can be joined with the other, and pinned to the ground.