Compost Socks For Erosion Control & Filtration 8" x 200' 15 mil It can be used for It can be used for base reinforcement for roadways Geotex 861 is a nonwoven geotextile fabric that is made from high quality polypropylene staple fibers that is needle punched to form a dimensionally stable fiber network Filtrexx filtration silt socks also commonly known as “compost socks for erosion control” are filled with a natural fiber that helps to hold sediment back while allowing water to flow though Available in both a polypropylene and cotton outer netting the socks are a high performance alternative to traditional erosion control material such as straw wattles and silt fences