Model: N916 EL NATURALISTA Upper: Leather Lining: Leather Sole: Rubber Fastening: Zip Women's N916 Mid Calf Boot from El Naturalista is made with leather upper. Features zip fastening is providing easy foot entry. Boot is finished with rubber outsole. El Naturalista shoes are design to fit the natural shape of the foot. The styles that have this ergonomic shape do not compress the foot when walking or rest, providing great comfort with every step.