Pottery Barn Seaton Textured Cotton Blackout Curtain 100 x 84 Color: Oatmeal New | $279 retail Made of 100% Cotton. Blackout liner: Crafted from 100% polyester, it prevents most light from entering windows to help darken the room. The curtain’s 3-in-1 construction offers three hanging options: pole pocket, hanging loops, ring top. Detailed with blind-stitched hems. 50" wide panels have a visible seam where the panels are sewn together. Every additional 50" will add a visible seam. Length includes height of rod pocket.