Cocoon Silk Mummy Bag Liner, natural white color. Like new pre owned, used once! Use the COCOON Silk mummy liner on its own in warm climates or put it inside your sleeping bag to add some extra warmth on chilly winter nights. Features Liner protects and keeps your sleeping bag clean, and can add up to 8.4°F (5.3°C) to the temperature rating of your sleeping bag Use it alone in warmer climates or when spending the night in a hostel; silk feels cool in the summer Hand or machine wash the with mild soap; drip dry or tumble dry on low