TERRAM Geocell is a blanket of three dimensional cell structures applied to a slope surface to greatly improve resistance to erosive forces such as rainwater run-off on steep or unstable slopes, or slopes exposed to severe hydraulic or mechanical stresses, and which often eliminates complicated and expensive alternative construction techniques. The cells can be filled with a variety of infill materials depending on the application, such as topsoil, aggregates (from sands and gravels to larger stones and cobbles) and concrete of various strengths and surface finishes. stresses.