El Naturalista STELLA women's Shoes (Pumps / Ballerinas) in Blue Leather, Available in women's sizes. 4, 5, 6. Cowhide upper & lining Committed to the preservation of the planet, the El Naturalista brand gives priority to the use of biodegradable materials in the manufacture of their products. They are worked in a natural way by altering them as little as possible, so that in the end we can feel their natural textures & fragrances! El Naturalista designs their products with eco-friendly materials. Free Next Day Delivery & Free Returns on all orders!