Made with RealFLEECE™ corespun fabric for warmth without extra weight, the Atom Zip is ideal for cold, active days. It is naturally and breathable and will regulate your heat whether under a shell or as a warm outer layer for your active adventures. Also features thumb loops, zipped hand pockets, a zipped, welded chest pocket and a chin guard to prevent chafing. And don't forget Merino's natural odour resistant properties!