All our Roman blinds come lined as standard. Alternatively, you can choose a Blackout lining, or if you would like a fuller, more luxurious look, choose our interlining option. Interlining adds an additional layer of insulation as the lining is bonded with a polyester cotton face and polyester wadding on the inside, which is designed to enhance the appearance of the blind, and also adds a thick layer of insulation. The wadding increases the insulation properties of the blind by up to 21% when compared to a standard lining.