DeWitt Deluxe Pond Netting is a sturdy, safe material to install over ponds to prevent leaves and other debris from entering the pond environment, while protecting fish and other pond life from predators. Constructed of 1/4" polypropylene strands bonded together, and is UV-treated for longer life. Allows sunlight, air and moisture which helps maintain the proper biological balance for all pond life. Easy to use and install.