Aquascape Woven Microgrid Geotextile is a durable, woven geotextile material ideal for use in a variety of applications. The material provides a long-lasting barrier to prevent rock and debris from entering sub-surface water reservoirs while allowing water to easily infiltrate the storage basin. The convenient 4? by 4? pre-cut sections are perfect for most project applications, including rainwater harvesting systems, Pondless® Waterfall reservoirs, permeable pavers, and fountain basin applications. In permeable paver applications, the geotextile will effectively keep the base aggregate bed on top of the AquaBlox® or other water storage matrix.