Outwell's Constellation sleeping bag offers excellent performance and quality, a well-thought-out design, excellent materials, and a high-quality filling. The durable, extremely soft brushed outer cover, 100% cotton inner cover, and premium Isofill filling ensure the best possible camping comfort. The sleeping bag features liner attachment points with loops to which the liner is attached with snap fasteners. Its single layer construction includes a layer of high-quality synthetic insulation material with extra filling, providing optimal bulk and comfortable warmth in sleeping bags designed for low temperatures. High-load zippers manufactured to Outwell specifications ensure easy use and low wear over time.