The Mountain Equipment OREUS HOODED JACKET is Mountain Equipment's warmest, lightest, and most packable synthetic jacket, featuring groundbreaking Aetherm™ insulation. This innovative technology uses a fabric made from heat-reflective fibers that is significantly warmer than conventional materials of the same weight – and is also highly breathable and compressible. After five years of intensive development and extensive testing in the Alps, Patagonia, and the Karakorum, the result is a jacket that combines lightness with outstanding thermal performance. Our athletes traded in their down jackets for the Oreus, convinced by its functionality and durability under the toughest conditions. Whether as an outer layer for alpine climbing, a super-warm midlayer for ski touring, or a compact safety jacket, the Oreus is a reliable companion wherever you go. With fast drying, minimal weight, and a small pack size, it is perfect for a variety of mountain adventures and an indispensable part of your outdoor gear.