Show Me Your Mumu Go To Sweater in White. Size S, XL, XS. Cotton blend. Made in USA. Hand wash recommended. Lightweight knit fabric. Item not sold as a set. SHOW-WK173. MS4-4938. 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.