Premium lining - This is a Poly/Cotton fabric which helps to protect the main fabric from fading by sunlight. It is a thin backing to the blind. This is Ivory coloured. Blackout - Blackout lining greatly reduces light from outside penetrating a room. Our orders are sewn across the blind and this causes light to come through but this is very minimal. The Blackout lining is available in Ivory and White. Thermal - This will keep the heat either in or out. In winter, it will help to keep the room warmer but in summer, it will help to keep the room cooler. This is Ivory coloured. Interlined - Interlining improves the look of the blinds by giving more fullness. This, in turn, makes the blind more sumptuous and hangs nicely. Interlining also has some qualities of the Thermal lining.