The (2) Duck Indoor Shrink Film Window Insulation Kit includes 5 packs of clear, translucent window film made of crystal material. Each pack contains a 62 in x 210 in sheet of window film that is cut to fit any room. With a film thickness of 19 µm, this product from Duck provides insulation for windows to help keep rooms warm or cool. Made in China, this window film is designed to save energy and maintain privacy while still allowing natural light to filter through. Ideal for any room in need of extra insulation, this product is a practical and effective solution.