Love Love Love these Faux Silk Taffeta Curtain Panels, for their elegance, fullness, drape, subtle sheen (to evoke the 'look' of real taffeta), colour variety (comes in assortment of colours) and versatility in use (can be inserted into curtain rod directly for a more informal casual look, used with metal ring clips, or used with drapery hooks onto curtain rings for a more formal drapery effect. The faux-silk fabric has a low-medium sheen which successfully achieves a rich 'taffeta' look.  The panels are also lined to provide good opacity and privacy.  I wouldn't say they completely block out 100% of light (ie: blackout), more so approx. 80-90% of light.   Overall, the quality is exceptional and at an attractive price point.  They achieve a high-end look without sacrificing your pocket-book!