A painting begins with an empty canvas, a novel starts with a blank page, and a song kicks off without a single lyric. Then an inspiration, an idea, or a spark of creativity turns those blank spaces into works of art.
The same goes for decorative apparel. Before a design is screen printed or embroidered on a t-shirt, it is simply a blank piece of fabric. With that blank piece of fabric, the customer can do as they please. Some people like the clean blank t-shirt look, some prefer an all-over print design, and many others go with something in-between.