The ¾” Prefilled Gravel Bags are erosion-control bags filled with ¾” gravel and packaged in durable woven poly bags. They are used to slow water flow, reduce soil displacement, and filter sediment in areas where runoff can cause erosion or carry debris into drainage systems. These bags are commonly placed around storm drain inlets, along slopes, or at construction site perimeters as part of standard sediment-control measures.