Nice material, seems good quality, curtains are a satin type fabric with embroidered white stitching pattern and do not look cheap.  I got the electric blue, which is a midnight blue very close to navy.  They are room darkening but not true blackout, and have no blackout backing although they do keep my room darker than the cream colored blackout curtains I previously had with vinyl backing.  However, they are less sound proof than the curtains I previously had due to the lack of backing. If you got these in a light color you would probably want to buy separate vinyl blackout panels to attach behind the curtains.