Cotton polyester blend Liners are sewn to the back of the curtains. the price is for a pair ,two panels. Cotton Blend lining blocks 60% lights, Blackout lining blocks over 80~ 90% lights. All curtains & drapers are custom made, current lead time is 10 days.Package will be shipped via DHL express, takes approximately 5 days. Add this listing to your cart along with your curtain choice if you’d like to have blackout lining added to your curtains. Please select the same size as the curtains you are purchasing. Help your home decor last longer with insulated blackout fabric for your window treatments. Blackout fabric not only completely blocks the light, it insulates against heat & cold, saving you money & energy while providing noise reduction & privacy. Add Blackout Lining Or Cotton Blend To Your Draperies, Do Not Sale Seperately