This particular Duoline is created by bonding our popular Outblack blackout lining (fabric face out) to a Polyester fleece – the fleece is specifically useful when a nice crisp fold is required for roman blinds. The three-pass blackout coating offers complete light exclusion and extra protection from sunlight. Thermal properties keep sound levels down and the heat in and cold out. Using a Duoline is the perfect way to reduce make up time for curtains and blinds, whilst creating opulent window treatments and improving the insulation levels of any room. The Duoline is placed at the back of the face fabric to create softer, fuller folds for a more luxurious drape.