Crafted from soft, warm midweight fleece, this kids REI sleeping bag liner is a superb choice for home, camp or cabin. Use sleep sack on its own for warm weather and slumber parties, or use it as a liner inside a childs rectangular bag to add 10 - 15degF of warmth. Using as a liner minimizes wear and tear, extending the life of the sleeping bag. Full-length, separating zipper allows liner to be unzipped and opened flat for use as a blanket. Plush midweight polyester fleece dries quickly and insulates even when wet, and is easy care. Includes nylon stuff sack.