This soil cover film from Nature warms your soil and reduces evaporation to conserve water. You will surely have earlier and higher yields when using black mulch! Polyethene material: The grow foil is made of black polyethene (LDPE) and has a thickness of 50µ. It is also UV-resistant.Multifunctional: This cover film can be used for many purposes with its rectangular shape and thickness. You can use it as a traditional cover film to protect the floors and furniture when painting or as a cover for your car and for many other purposes.