The Sampson™ Construction Silt Bags are an economical filtration bag designed to help filter silt and sediment out of water. Sampson™ Construction Silt Bags are designed in heavy duty geotextile nonwoven material to handle various flow rates and sediment levels. Sampson™ Construction Silt Bags have been used on construction sites for excavation and dredging locations to contain and filter out sediments, sand, rocks, debris.