Rainbow Bunk BedThere is a spectrum of choices for colors and styles in the RAINBOW COLLECTION. The Rainbow Collection is a series of metal bunk beds that come in multiple bed size combinations and six color options. Styles include a twin twin, twin full, and a twin futon base combo, and each style comes in six colors. Common features include full metal construction with non recycled heavy gauge tubing, and a focus on safety with improved rail reinforcements.