Arc'teryx is named after Archaeopteryx Lithographica – the first reptile to develop the feather for flight – so you shouldn't be surprised that it knows a thing or two about tackling mountainous climes. The Squamish jacket? Well, this hooded shell layer is a super light and windproof piece which provides optimum shelter from mild, but shifting conditions. Designed to regulate your temperature, it's fully breathable and allows moisture vapour to escape, too.Arc'teryx shell jacket100% nylonExposed zip fastening at frontRegular fit, funnel neck , drawcord hood, long sleeves, elasticated cuffs, branded foil print at chestMachine wash mildSize medium: length 30in / 76.5cm, chest 46in / 117.5cmModel is 6ft 2in/1.88m and wears a size mediumLightweight, non stretch