Wingliner Duo The off-road solution for professionals is one of our top sellers. Its robustness and reliability is needed and valued in all climate zones of the world – from Australia to Iceland and Scandinavia to Brazil. He does not freeze in the cold and does not run out of breath in the heat. The built-in center support makes the "Duo" extremely durable. The different temperature zones in the loading area enable optimal transport options – even in rough weather.