3-season down sleeping bag with a thermal rating down to -20°F for extreme use such as high elevation touring and expeditions in very cold regions. Leave your stuff sack at home, this bag stuffs inside its own footbox for ultralight travel. Spacious pack sack with a small zip pocket for valuables - lightweight with water repellent treatment - high quality white Goose Down from Europe - 90/10 850 cu in - trapezoid chamber construction - body contoured mummy cut for optimal heat management - footbox - pillow compartment inside the hood - long side zip down to the foot section - pack sack with compression straps that can be lengthened to turn the bag into an emergency backpack - internal mesh pocket.