Hydro Crunch Panda film is black on one side & a 90% reflective white on the other side allowing light to be reflected back to your plants where it belongs. Panda film is an inexpensive reflective material for grow room walls or green house barriers or floors. Panda film can provide a light proof barrier for partitioning rooms, covering hydroponic grow media, making reservoir covers, or a variety of other gardening uses. Dimensions: 10 ft. wide, 50 ft. long and 5.5 mil thick. This is a very heavy duty 5.5 mil film for a variety of uses.