The exceptional synthetic fibre insulation jacket More warmth in cold, wet conditions without making your body work harder? That's exactly why we developed this synthetic fibre insulation jacket with the Swiss companies HeiQ and Nespresso. With its HeiQ XReflex insulation membrane supported by Xefco with aluminium from recycled Nespresso capsules, the insulation jacket stores 20 % more heat. Thanks to the breathable Pertex® Quantum material made from hard-wearing nylon, excess heat and moisture can escape while keeping you protected from light moisture. Stretch and a slightly lower insulation density on the arms ensure optimum freedom of movement. The truly special thing about the Mammut x Nespresso IN Flex Hooded Jacket: the adventures you can experience thanks to the extra insulation protection.