Show Me Your Mumu Stanley Sweatshirt in White. - size S (also in XS) Show Me Your Mumu Stanley Sweatshirt in White. - size S (also in XS) 70% cotton 30% polyester. Made in USA. Machine wash. Front screenprint graphic. Ribbed trim. Fleece lining. SHOW-WK155. MM3-4725. 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. Shop the latest in fashion from Show Me Your Mumu