Svalbard is a warm and comfortable down sleeping bag with a 90/10 goose down construction and Pertex fabrics. It features a water-repellent and breathable coating with a 1,000 mm water column, and a fiber layer at the foot box to maintain its fit. The 3/4-length zipper is protected with a thick down flap, and the extra thick heat collar makes it the warmest down sleeping bag. It's perfect for winter camping and expeditions, prioritizing weight, volume, and comfort