Some of the dresses have double layers of fabrics used to give it more volume and to create an amalgamation of different shades. (stylesgap.com)
They can be made of either a single or a double layer of fabric, and may be textured (like a facecloth) or soft (like flannel). (thinking-about-cloth-diapers.com)
The bra has a double layer of fabric. (lansinoh.com)