A MummyLiner is an extremely lightweight tapered sleeping bag liner. Uses: sleeping bag liner for mummy-shaped sleeping bags, keeps your sleeping bag clean and extends its lifespan, adds insulation and comfort, and as a sleeping bag in warm climates. Features include a drawstring hood, wide top opening, and boxed foot end. Microfleece is lightweight and compact. Fine microfibers transport humidity quickly to the surface. The material dries extremely fast and is practical in wet conditions.