A close-up image of a black filter sock used for erosion and sediment control. The sock is made of durable material and has a long cylindrical shape. It is partially filled with sand and placed along a construction site perimeter. The sock acts as a barrier, preventing sediment and pollutants from entering nearby water bodies while allowing water to pass through. Available at Parklea Sand & Soil.
General 

Filter Sock

Great for use as a water barrier on construction sites and around pools etc., Filter Socks are available in 1 metre and 2 metre lengths. They can be purchased empty or pre filled with your chosen material.