This sleeping bag has a special spherical design, the fabric is made of 300T Pongee, lined with 100% facecloth lining, and filled with 200 g/m2 hollow fiber, our camping oval cotton sleeping bag has a new diagonal quilting design, which can better hold the cotton, lock every inch of temperature, and enhance the warmth of the bottom of the sleeping bag. Semi-circular hood with adjustable drawstring keeps your head warm. Double-sided zipper at the bottom for quick ventilation and easy to unzip from the outside or inside. In addition to being used as a sleeping bag, it can also be used as a blanket or picnic mat. Machine washable, ideal for family trips or car camping.