The smaller size of the Cocoon 100% Egyptian Cotton Women's MummyLiner helps to significantly reduce weight and packing size. Not only is it lightweight and fast drying but it also adds up to 7.2F in warmth to your mummy sleeping bag's temperature rating. Extends the life of your sleeping bag. Use as a sleeping bag liner for mummy shaped bags, or as a stand alone sleeping bag in warm climates. Keeps your sleeping bag clean and extends its lifespan. Adds insulation and comfort. 100% Egyptian cotton is very lightweight and soft, yet durable. Drawstring hood. Wide top opening. Boxed foot end. Completely double stitched. Size: 83x3522 Weight 7 oz.