Beige does great job blocking light and lowering temperature
934480
These curtains saved my life! I live in Seattle, and the sun is up and shining at nearly 5AM at the peak of summer. On top of that, our bedroom is on the 3rd floor of our house with 3 west-facing windows, therefore the sun just bakes our bedroom right up until bedtime. We added these to our bedroom windows to help block out the sun, and I was thoroughly impressed at the job they did. I was concerned that the light beige colored I ordered wouldn't be sufficient, but I was pleased with how much light they really block out. My husband and I immediately started sleeping more soundly, and the temperature in the room in the summer was much cooler as a result. I can't recommend these enough, I'm so pleased with them! :)
3403766
As they said, the lighter colored curtains do not block as much light as the darker ones. So if you want a pitch black room I wouldn't buy the grey-white color. But they're perfect for my needs, and I love the way the color stands off of a white wall. I originally wanted all white curtains, but I'm glad I went with these. The back of the curtains don't have a lining, so they are the same color as the front, which I like. In my pictures you can see direct sunlight hitting my curtains. In the second picture I tucked the curtain into the window sill to keep the light from bleeding through. I have these curtains in the living room to keep the sun from glaring on my tv during the day and they work perfectly for this. ( On the fourth picture, you can still see on the screen where the direct sunlight was shining, but it really isn't all that noticeable when watching tv ) So if your window gets direct sunlight most of the day, I would buy a darker color. I needed 4 panels to fit my 95" in width window.
4218596
These are really good curtains to block out light and block out some of the traffic noise. I live on a street that gets very busy and these do help some. As for the light, they are not completely light blocking, but do block out a good deal of light, especially if you get the darker shade. I have a three window setup in my living room that faces west. In the afternoon and evening the sun blazes through those windows. Here in Texas that is a lot of heat!! These curtains make it cooler in the room and the light stays out so we are not disturbed. I bought six of them with 4 being in Indigo and 2 being in Latte.
3403789
I needed to block sunlight from entering my son's room and interfering with his naps. These curtains certainly fit the bill. I purchased the "Sky Blue" color and am impressed by how much light they block. Since it's a light color, I wasn't expecting total darkness, and to be honest, I didn't want that. I like having at least a hint of light so I don't feel like I'm in a casino.  But I'd say that at least 90% of the sunlight is blocked by this color and probably more so with the darker colors. And yes, they do indeed keep the room much cooler. As a bonus, they feel really soft and substantial. I fear I may one day tear them down and ensconce myself in them.
1984103
Does a fantastic job of blocking light, even without a white backing which I think makes curtains look cheap. They are the same color on both sides, and nice and heavy so they hang straight. They do come folded so you have to iron out the wrinkles which is a pain but then they look great.
4502013
Quality is excellent and it blocks the light even better than expected.
2409205
the fabric is nice and fluid and does the job in blocking the sun.  I wouldn't call it blackout tho. May buy another as the two are a bit stretched for the large window.
247452
Found these to be much less expensive on Amazon than from other stores.  The product does a great job of blocking light and the cold/heat that radiates from the window.  The color and pattern is very attractive.  I have these brand curtains throughout the house and I believe they make a difference at helping to energy efficient.  Will definitely purchase this product again.
198589
These are very nice curtains, and they look great hanging in my baby's room.  I got the beige color, and although they do a nice job of blocking most of the sunlight, these are definitely not "blackout" curtains.
1631779
Great set of curtains! It fit perfectly in the window and I used this with a tension rod in my apartment to block out the light in the bedroom. It's lightweight and the grommets are large enough to fit most curtain rods. Not sure how well this will hold up to the "thermal insulated" claim, but I'm very satisfied!
3929360
I purchased the black curtains and they do a great job of blocking out light. I just moved into a new apartment in the city and there are two or three skyscrapers with their lights on all night shining right through my room. These curtains block all that and let me sleep in near perfect darkness.
It also seems like they've been keeping the room a bit warmer during the night by dampening the cold drafts I used to feel coming from the windows. I just hope it will continue to help during the winter.
Like another reviewer pointed out, only some colors seem to have tiebacks so be sure to read the title description carefully as you go through each color. I did not do so, and ended up without any tiebacks. Though, it is my opinion that every option should include tiebacks. So yeah, I guess don't get the black curtains if you want tiebacks, but you probably won't get the same light blocking efficacy.
3709372
After realizing my new apartment had a streetlight right outside one of my bedroom windows, I began searching for blackout curtains with the criteria that they needed to have good reviews, a good price, and the color green I wanted. I could tell this brand had the first two areas covered, but I couldn't be sure the color would be right until seeing it in person. I am so glad I decided to make the purchase of four panels in olive because they are perfect! I adore the color--it's not so bright that it looks like a childish lime green, but it's not so dark or grayish to be what I'd really consider an olive green. It's more like a 70s tone yellow-green . I'd say the last product photo that shows a detail of the grommets most accurately reflects what the color looks like in person; the other photos make it look more yellow than it actually is.

The panels are made from a thick, soft polyester fabric that ironed well. To get them to hang really nicely I do plan to add some drapery weights to keep the bottoms from flaring. They don't have an additional lining, but even so they very efficiently block the bothersome streetlight. I used a return rod to hang the curtains to prevent light coming through the sides. Even in full daylight, the curtains significantly darken the room. In fact, I found that if I closed the curtains on both windows at night my room was almost too dark for my liking since I'm used to having some sunlight in the room in the morning to tell me to get out of bed! I decided to close the curtains on the window facing the streetlight but to leave the other window open and this has worked well for me.

I did receive this product at a discount but I am not affiliated with the company, and my review is based solely on my personal assessment of the product.
551853
These curtains do an amazing job at keeping out the light. They also keep the cool air in and the hot air out during the summer and keep the cool air out of my room during the winter. I would definitely buy these again.
1049177
We bought these for our daughter's bedroom to stop the light from coming in around her blackout shade.  The curtains worked very well and blocked the light around the edges of the shade. This was a very economical way to solve the light problem.
3475733
Easy to install and provides the level of privacy we were looking for while allowing light in.
1860188
Grayish white color is beautiful and the curtains are well made very soft texture. They really do block the light. I sleep so much better now.
3509668
These curtains are beautiful and hang well blocking off most of the light and keeping the room cooler this summer.