I've been looking for a solution to decorate the windows in my office for a long time, and finally found the perfect option on the helloalva website
https://www.helloalva.com/products/flat-roman-shade I ordered a flat Roman lampshade and was pleasantly surprised by the quality. The fabric is dense but still lets in enough light so the room doesn't seem dark. The lifting mechanism works smoothly and quietly, which is important for me, as I often work at night and do not want to wake the family. I recommend it to everyone!