Redi-Shade Block-Out Shades.
594981
Love these Redi-Shade black out shades. The price for 6 shades was well below store prices. They came perfectly packaged. Only one big problem as I finished installing the 6th and final shade there was a tear practically right in the middle of the shade. Its too late to take it down and return it as I have guests coming. One suggestion for the future would be before installing open and inspect each shade before hanging. Other then this issue the shades truly block out the light, fold up with ease and last a long time if needed. Highly recommend this product.
4137199
Purchased 4 panels for a large drafty window that faces west and always gets direct afternoon sun. Already had blinds up that blocked much of the light but allowed some to come through the cracks. The curtain does block much of the  remaining light but it glows brown and shimmers as the direct afternoon sunlight radiates from outside. I've noticed these curtains may block out artificial light better than sunlight.

Curtains are lined with a very thin white sheet on the back which blends well with our white window trim and white blinds when viewing them from the street. Were it not for the easy install, triple layers, and good price I'd consider finding a better light blocking option. However, these keep the glare down, help the cold out (or in) and soften up the room a bit so I'll keep them.

In summery: you are getting what you pay for - not 100% blackout but good curtains.
658670
These shades are perfect for my sunroom.  They let light in while maintaining privacy. I am happy with the color and easy assemble.  The cords were very long, you may need to adjust them by cutting.
2206812
These shades cling very well to the window and effectively block the sun.  The lack of suction cups and clips on these shades allows for more flexibility in their placement on the windows.  I was contacted by the seller in order to get feedback about the product and to guarantee satisfaction.  I appreciated this dedication to quality and customer satisfaction.
604195
The Redi-Sahde is great for my window. I didn't think A paper shade would work, but I was wrong. It is a great product and blocks out the sun and makes my house cooler, so I don't have to run the air conditioner as much.
<a data-hook="product-link-linked" class="a-link-normal" href="/Redi-Shade-3122531-Redi-Arch-Paper-Window-Shade-24-by-48-Inch/dp/B000LG99EG/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Redi Shade 3122531 Redi Arch Paper Window Shade 24-by-48-Inch</a>
3729833
Not that thrilled with these, they do what they are supposed to do, keep the sun out of your eyes while allowing you to wear your regular glasses.  I feel like they obstruct my vision while driving since I have thinner framed glasses and the frame on these cover where my blindstop is.
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.
2902027
Great shade, but it is a bit bulky to roll and takes up space. Perfect fit.
5591
I have these curtains in red in my living area and black in the bedrooms. They are all wonderful at blocking out light (have overslept a couple of times) and muffling outside noise (inconsiderate neighbors). Also, helps in keeping the house cool during the summer here in Texas.
4604733
nice fit but retraction of the blinds are a challenge
501931
This film excels at transmitting spectrum patterns into a room when applied onto a window that receives direct sunlight.  There will also be amazingly brilliant color blocks radiating from both sides of the window's surface at these times--almost painful to the eye.  I am waiting for complaints from my condo association, although technically the product has no color.

What it is less good at is privacy.  it is much more clear than translucent and the prismatic patterns are obviously repetitive.
454101
These navy drapery panels block out all of the light. They need to be ironed but this is easy to do-just iron the back side. They hang beautifully.
4063386
Nice product,  semi opaque however. I doubled up the curtains for complete privacy
754613
these are excellent at blocking the sun.  I do not use these indoors however, I have them attached to a portable clothing rack and use them outside to block the sun when I am astro-imaging.  When trying to capture video of the sun it is important to be able to view the laptop screen, these curtains block the sun so I can see the screen outdoors.  I have also used the curtains/clothes rack to block neighbors lights when doing nigh time astronomy photos from my back yard.
736074
Fits over either women's  or men's  eyeglasses. Blocks out the sun from coming through the top and sides of regular eyeglasses.
994006
Heavy composite blinds.  These block a good amount of light and are easy to operate and install.  Make sure not to buy these if your windows are not 35 1/2 wide.  Mine are 35 3/8, so I had to shave off some of the top, although the blinds fit perfectly.
4855887
They really block the light. I will be buying more for the other windows. A big help would be a sizing chart. I  had to  order a 2nd due to my patio doors are oversized