So these are not black out at all- light definitely goes right through these.  The colored fabric (Black top/tan bottom) is a thin polyester, kinda like old grandma pants feeling. Very wrinkled, of course, from tight packaging, had to iron which was easy enough. And the lining is a super thin, slightly silky gauze type material that is completely see through. In the picture the tan color looks like a very light, neutral taupe color, but in reality it is more like a darkish, yellowish sand color. I Like the pictures and the idea of the modern, bold-block and contrasting colors - but the execution of the bottom color and the fact that they should not be marketed as "Blackout" makes me rate this product a two. Two stars off for in correct marketing and 1 star off for the bottom color.