The Rugby Sateen twill weave insulated room darkening blackout grommet top curtain panels bring a rich and luxurious look to any room. These curtains are interwoven with room darkening blackout insulation provided by LightBlock and Thermax technology. These panels will block light, prevent harmful UV rays, and efficiently prevent cold or heat transfer from outside. They will increase the energy efficiency of your home while providing privacy and allow you to create darkness at any time of day.