Show Me Your Mumu Austin Dress in Pink. - size XS (also in ) Show Me Your Mumu Austin Dress in Pink. - size XS (also in ) Poly blend. Dry clean only. Fully lined. SHOW-WD306. MF7 616. Mumu is not simply a garment, it is a lifestyle. Spontaneous. Fun. Easy going. Unique. Versatile. Imaginative. It all encompasses the mumu, and a way of life.