Daylight filters are designed to minimize the sun's heat coming in to a room to a minimum.
They offer light clear of contrasts and filter the daylight so all hazardous sparkles and reflections are blocked.
The foil of daylight filters contains a special prism that ensures that the sunlight is forcefully reflected (ca. 80%). In all circumstances there is a clear view. Because of the high insulating properties of the foil you can save up to 20% on your utility services bill.