Our Bales are made from 100% synthetic fibers produced in the size of 3.75 foot grass hay bale (45"x15"). GeoBales are strong, durable, and an excellent temporary sediment and erosion control device. The Bales are environmentally safe and completely weed free. We manufacture our Bales with pre-made stake holes for quick and easy installation. The sediment trapped in the GeoBales can be washed out and the GeoBales can be reused many times.