Arc’teryx strives to cultivate design that allows the wearer to be fully immersed in an outdoor experience without being affected by external conditions. Engineered for running, hiking, climbing and the rest, the Proton Lightweight Hoodie Jacket lives up to that goal, packed with thermal protection and light wind resistance. It’s cut to a trim fit so as not to hinder your performance, whilst Fortius™ Air 20 face fabric provides unmatched breathability