Show Me Your Mumu Why Knot Skirt in Blue. Size M, S, XS. Poly blend. Made in USA. Fully lined. Pull-on styling with elastic waistband. Front tie detail. All-over sequin detail. Skirt measures approx 17.5 in length. SHOW-WQ74. MR1-4431. 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.