While Sun Zero’s Oslo blackout curtains are easy on the wallet, they feel very well made with a material that is reminiscent of velvet. They are available in a variety of both light and dark colors which all offer excellent light-blocking, as well as an energy-efficient design that purports to reduce energy loss by up to 50 percent and reduce noise by up to 35 percent.
The rod pocket style aids in light-blocking since no light comes through any grommets. One downside we noticed during testing is that installation is a bit tricky. It wasn’t immediately evident which end was the top and which was the bottom since both had pockets that could accommodate a curtain rod. The curtains were also a bit difficult to slide open and close, but that could have been an issue with the size of my curtain rod that was at the upper limit of the maker’s recommended size of 1.5 inches or less.