Independently U.S. laboratory tested certifies this curtain is 99.8% efficient in blocking out light! This heavyweight curtain panel features a superior, triple weave fabric construction that blocks out light and stops heat and cold from penetrating through the density of its construction, which invisibly integrates black yarn into the pattern of colored yarns. This curtain has a beautiful floral design that compliments any room and matches back to all neutral colors. This 104" double wide curtain panel is perfect for patio doors and wide windows. An attachable wand can be positioned on either side for easy opening and closing. Each curtain panel has 16 grommets (1.5" inside diameter). Pull it across your window and voila! A blackout curtain that really works! This superior fabric is 100% easy-care polyester. Machine washable. Tumble dry low. Imported.