The midlayer. It needs to keep you warm without adding bulk so you can wear it under a shell. But it needs to breathe too, so you can wear it over a baselayer without getting too hot. Thanks to the smooth-face fleece, this is exactly what the Messaluna does. The lofted fabric structure creates little air pockets that retain body heat helping to keep you warm without any unnecessary weight. The fleece is also naturally pill-resistant and durable, quick-drying and easy to wash. It stands up to regular use making it perfect for hut-to-hut trips or wild camping.