GROT film is an effective and strong cover film for felling residues like branches and tree tops that are collected in the forest and put on stack to be converted into biofuel. To minimize the negative impact of snow, rain and moisture, these stacks are covered with GROT film to increase its thermal value. By standard, GROT film is produced as a green-brown co-extruded blown film in three layers, but of course, it is possible to order it in other colours as needed. The film can also be delivered with flexographic print in 1-4 colors.