These curtains are heavy and the thermal and blackout elements work BUT! They arrived as I expected creased from packaging. When I tried to iron them I was completely unable to move creases within the fabric. Nothing to do with folding. I spent about 30 minutes on one curtain because I hate having to return items and didn’t have time to replace them. It has spoiled the effect for me. I just hope that they will improve after hanging for a while.