8-Inch GeoCellVodaland's 8" geocell is designed for heavy duty applications, such as parking lots with heavy traffic, and steep retaining walls. We make our ground grid from polyethylene, which is very durable, so it will last a long time. It can be filled with different types of aggregates, soil, sand, crushed gravel, stones, etc. The sections are easily stretched over your surface and anchored down, then filled with aggregate. One section can cover 164. 5 sq ft.