Blackout fabrics and curtains are a practical and decorative addition to the interior. Do you need to sew curtains that will let in almost no light? Reach for a material called blackout or dimout. This is a fabric that excels in its high degree of blackout, but at the same time can also dampen sound from the outside environment. Curtains, on the other hand, let in daylight and give the room a cozy atmosphere. Their combination combines functionality with an elegant appearance.