Designed for serious cold, this sleeping bag offers a comfort rating of -8°C and a lower limit of -15°C, ensuring warmth in frigid conditions. Weighing approximately 1,335g, it features 650 fill-power down insulation and Montbell's innovative Super Spiral Stretch System, allowing the bag to move with you and eliminate cold spots. The 30-denier water-repellent polyester taffeta shell adds durability, making it a reliable companion for winter expeditions.