Show Me Your Mumu Tilly Top in Neutral. Size XS, M, L. Cotton blend. Front button closure with wrap tie hem. Lightweight voile fabric. SHOW-WS340. MM1-4802. 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.