What is a maxi dress anyway? A maxi dress is a floor or ankle length informal dress. Maxi dresses are form fitting at the top and loose flowing at the bottom, cut to flow over the body. Maxi dresses are usually made out of cotton or polyester and come in a variety of necklines, colors, and patterns. The ZARZAR FASHION definition of a maxi dress is a long flowing dress that makes women feel very sexy during the summer. A maxi dress is easy to throw on, chic, and super comfortable. You can either wear maxi dresses with designer sandals for a casual beach look or dress them up with fun accessories and beautiful summer wedges!