Marimekko Petrun Unikko DressCotton Dress The Petrun t shirt dress is made of cotton jersey in the Unikko pattern. There is a central seam in the back. The A line dress has a relaxed fit. Unikko (poppy), symbolizing creativity, was born in a time when hardly any floral designs were included in Marimekkos collections. Maija Isola, however, was fascinated by the theme of flowers and decided to create an entire range of novel floral prints. Main Material: 100 % Cotton Fit: Relaxed