The SATORO AR Crew Neck Shirt LS from Arc’teryx is a midweight Merino wool baselayer crew designed for prolonged all-round backcountry use. It leverages the advanced fabric technology of Nucliex STR that is created by wrapping Merino fibres around a nylon filament to combine the natural comfort, efficiency and odour resistance of wool with the durability of the nylon core. Elastane fibres maintain the next-to-skin fit for maximum thermal efficiency and efficient moisture transfer. The articulated sleeves offer full range of motion while maintaining a compact fit.