The Frost King® V75H Window Insulation Shrink Kit contains one sheet of extra-large film to insulate one extra-large window or 5 standard size windows helping increase their R-Values up to 90% for energy-saving efficiency. Helps keep out drafts and dust. Film shrinks crystal clear tight and wrinkle free with an ordinary hair dryer (not included). The shrink film can be easily installed on metal painted varnished wood or vinyl clad window frames with the double-face tape included.