GGS Coir Mat 700 extended term Erosion Control Blanket is composed of a 100% hand spun coir yarns. This 100% biodegradable mat provides erosion resistance while supporting growth and development of vegetation. GGS Coir Mat 700 blanket is intended for use in applications requiring protection for a period up to 36 months. Actual field longevity is dependent on soil and climatic conditions.