Best Products: Janovic Roller Blinds
While their mechanics are not the best in the world, Janovic‘s roller blinds come in a coated linen/cotton, which can either be totally blocking or have a nice transluscence and don’t cost too much (they are one of the cheapest solutions that Janovic sells). You can also walk down to your neighborhood Janovic store and get them right away. A shade like the one in the pic is about $30-$40.
Since it is very hard to find attractive, plain roller blinds, we consider these a great find (just be sure to measure your window correctly, so they fit).