Geo bags are flexible, durable bags made from geotextile fabrics, which are woven or nonwoven synthetic materials designed for use in civil engineering and environmental applications. These bags are primarily used to manage water flow, prevent erosion, and stabilize soil in construction sites, riverbanks, coastal areas, and other environments where soil erosion is a concern.
https://www.singhalglobal.com/products/geo-bags-geo-textile-bags