Made from soft, durable, midweight fleece with a Durable Water Repellent finish, this REI sleeping bag liner is a great choice for camp or cabin. Slip this liner inside your rectangular sleeping bag to increase its warmth. Use liner on its own in warm-weather conditions. Full-length, separating zipper allows liner to be unzipped and opened flat for use as a blanket. Convenient tie-strings at foot make it easy to roll up, secure and take along. Includes nylon stuff sack with fleece base for use as a pillow. Machine washable for easy care.