If you've ever wanted a simple method for using mortar or concrete to protect a slope, line a cavity or encase a deteriorated member, in or out of water, perhaps nylon fabric forms are what you needed. These are flexible containers that can be filled by pressure injection with fluid fine-aggregate concrete. They permit controlled bleeding of mix water through the fabric, which reduces the water-cement ratio. This causes rapid stiffening, produces high strength and provides exceptional durability. When the mats are used to protect slopes they are spread over the terrain after it has received minimal grading. The fabric form is then pumped full of mortar. In typical installations such as those to protect against shore erosion, the mortar is introduced at various levels in sequence represented by the series of numbers in the sketch. At each level the mortar is pumped into the upper layer of fabric on about 8 to 10 foot centers. The top edge of the fabric form is located about two feet above mean wave height and the lower edge at least two feet below mean low water, or as low as needed to reach a stable slope. In more detail, slope protection involves the following five steps: one, remove stumps, boulders, and brush. Grade sufficiently for the slope to be stable if there were no erosion, usually no steeper than 1:1. Two, lay out the 2,000 to 3,000 square foot mats over the embankment. Three, sew the mats together at the edges with heavy nylon thread so that the mats will create a monolithic structure of the required length and width. Four, inject mortar into the fabric envelope with a mortar pump. Finally, five, backfill the toe trench at the top.