White total blackout curtains designed with a coated fabric that will block all light, these linings will upgrade your curtains to total blackout. Simply take down your existing curtains, place them on top of the blackout lining, taking care to line up the eyelets, rehang your curtains and you're done! The blackout linings are slightly shorter than standard ready-made curtain drops, this is to ensure the lining does not fall lower than your existing curtains.