The Arc’teryx Rush Insulated Jacket is lightweight, packable, and as warm as all get out thanks to its windproof, water repellent, and highly breathable GORE-TEX INFINIUM face fabric that’s been enhanced with an ultralight Hadron LCP. Perfect for those who run cold, or for those low-output rest phases of alpine mountaineering expeditions, the Rush Insulated Jacket is one of the most exciting new pieces from Arc’teryx.