Bamboo Ring Top Curtain BL02 38-Inch L x 59-Inch H Insulating Blackout Liner for Panel, Off-White 100% Polyester Indoor insulating blackout liner Features "easy-fasten hook and loop system for hassle-free installation Energy saving: insulates against heat/cold loss Increase Privacy and Blocks sunlight 100-percent polyester face / 100-percent acrylic backing