The material is thick and will block light based on where you place them in your home. Texture is nice and adds value to your decor. My first photo shows the curtains hung in front of my patio door. Since the sun shines directly on this glass door, I will need to purchase an extra lining to place behind the curtains for 100% light blockage. My second picture shows the curtains hung on the opposite side of the house that has a porch and roof. In this location, the curtains have 100% light blockage due to the covered porch. Also, I have a sheer panel behind the curtains.