For those that take their adventures into the heart of winter or into colder climates, the Oberon provides the crucial protection you need. We engineered the Oberon to protect athletes from extreme conditions during extreme pursuits, meticulously designing every gram to add warmth and security for the user. Certified by the Responsible Down Standard, the bag's 800-fill Nikwax Hydrophobic Down^™ repels moisture and stays warm in damp conditions. Get better rest while keeping the cold at bay with the Oberon. Storage sack and compression stuff sack included.