Arc'teryx Eon SLW Pullover Hoodie - Women's: Made with naturally soft and odor resistant Merino wool, the lightweight Arc’teryx Eon SLW Pullover Hoodie is ideal for active use and extended backcountry trips. Merino wool naturally adjusts its thermal properties as it reacts to changing humidity levels. The premium textile features highly resilient stretch to maintain skin contact, maximizing moisture management and thermal efficiency, speeding dry-time, and reducing layering bulk.