This mummy shaped cotton liner by Nordisk is a very classic accessory for your sleeping bag. It is soft, warm, light and has a small pack size, making it a great choice if you want to add more luxury and flexibility to your sleeping set up. Cotton liners generally add 3°-5° C to your sleeping bag, extending your bag’s range of use. Cotton is thinner than fleece, but also a lot lighter. Moreover cotton is more durable, fast drying and breathable. Making it ideal for trekking in summer, where it also can be used as a stand-alone sleeping bag, a great choice when travelling light.