These curtain panels were beyond my expectations, and especially given the low price. 
They are quite sheer, just as I was hoping. The background fabric is a soft, natural white, with the look of a very sheer linen. The design is embroidered in silver thread. The delicate pattern is reminiscent of a tracery found in Art Nouveau, or in early Art Deco, so it fit in with the vintage furniture in my dining room. However, the soft waviness of the design could also blend well in mid-century decor.
The overall quality is surprisingly good and the panels were easy to hang.