Thick, quality is super!

These are very good at stopping light, the material feels soft like velvet and is a good weight. They don't appear to be poorly made.

Of very good quality, it keeps the room quite dark.

I purchased the dark grey ones. They don't completely block out light, maybe 60%. Given the price, I'm not happy. The photos are inaccurate; I can't speak for other colors, but the dark grey ones don't perform as advertised. They feel like a moderately thick polyester, not a special fabric designed to block light.