Roberto Cavalli embraces a "Savage Instinct" for its spring-summer 2019 campaign. The Italian brand ventures outdoors with photos by Mert & Marcus. Model Luka Isaac leads the advertisement, joining Kendall Jenner. Styled by Marie Chaix, Luka dons bold numbers. Chaix highlights the designs of Paul Surridge with leopard prints, ribbed knitwear, and leather.