KEEN x Gramicci Newport Retro Sandals Hemp. At KEEN, every product is designed to provide comfort in the most extreme situations through the use of sustainable materials. The KEEN x Gramicci Newport Retro is ready to take on escapades, combining the protection of a rugged trail shoe with the comfort of a sandal. Features include a textile upper, quick dry capabilities, a bungee cord and lace-lock system, an EVA insole, and a rubber outsole.