Dark blue/black - Sun protection film – Inner. This type of film provides a high level of protection from sunlight and warmth, but is darkly tinted. If protection from sunlight is the most important thing, we recommend this type of film. However, if exposure to light is equally important it is better to use a lighter coloured film, e.g. our Silver 70 or Copper 55 film. However, you can achieve the maximum amount of protection from warmth with film attached on the outside. Please observe the suggestions for use at the bottom of this description to avoid breaking of glass.