GroGreen COIR LOG 120100 Coir Sediment Control Log - This Coir Sediment Control Log is composed of 100% Coir Fibers confined by a biodegradable net to form a log of a specific diameter. The biodegradable netting is hand knotted at distances of 1.75” x 2.15” to maintain the shape of the log. Coir Logs are designed to reduce hydraulic energy and filter sediment laden flow in channels and on slopes. The logs are flexible to conform to the soil surface and are secured by staking. Coir degrades over a period of over 2 years.