These are just okay. They are definitely not ‘blackout’ but classify as ‘room darkening’ since they are lined. The light still comes through these 
curtains quite easily into the bedroom where they were hung. The material is canvas-like cotton. I washed mine before hanging following the directions on the packaging. They wrinkle extensively when washed and are difficult to iron. They also shrank slightly. That was fine since I didn’t have to shorten them as a result. If you want a more rustic looking curtain with room darkening capabilities then this is a perfectly adequate curtain, although expensive for the quality.