These drapes darken a room. Think hotel, drapes closed dark. They are thick, not luxurious thick, just thick thick polyester. They will keep out some heat, no doubt.I like it. That‘s what I wanted.
This is a good two-layer curtain (it has an inner layer of black cloth for more light blockage). I ordered two pair, and both came in good shape, matching color and length. The fabric is heavyweight enough to drape naturally, without any ironing. The curtains themselves are complete blackout, though some light will seep in around the top and bottom depending on the type of curtain rod used.