Structure: The outer layer of the flexible drain pipe is made of non-woven filter layer and polyester fiber ensuring effective filtration and preventing sediment from entering the pipe. Better water permeability for all-round penetration. The built-in steel wire ensures that the pipe is strong enough to cover soil or gravel. Function: The flexible drain pipe combines the functions of water absorption water permeability and drainage. It allows rainwater to penetrate into the surrounding soil and store it. In seasons with low rainfall it can store rainwater in the soil. In seasons with heavy rainfall it can discharge excess rainwater to where it is needed. Multiple Uses: For example courtyards backyards lawns gardens fences landscapes terraces construction sites sidewalks commercial areas industrial areas etc. Extended Length: You can directly connect two permeable pipes to increase the length or you can use PVC pipes to connect (PVC pipes are not included) Easy to construct and lay: Flexible easy to stretch bend and adjust to your exact specifications. This means you can spend less time cutting measuring and installing so you can have more time to enjoy, Manufacturer: Kanduo