Day-night cellular shades are also known as “duofold” shades as they have two layers of fabric that you can adjust independently to switch between day and night like functionalities. The top or upper layer is a sheer fabric that allows light to filter through. On the other hand, the bottom layer is made of an opaque fabric that blocks out light. In this way, you can get control over the amount of natural light entering your RV, as well as privacy.