Sportneer 510GSM cotton sleeping bag Nominal temperature 5-25°C. The comfort temperature is 10-20℃. Made of high quality materials (polyester taffeta outer layer, polyester pongee inner lining, cotton filling). For more convenience, we designed a two-way zipper at the bottom. The semi-circular hood is equipped with an adjustable drawstring. The right size: the Sportneer 220 x 75 cm sleeping bag for adults is the ideal sleeping bag for everyone. When unfolded, its dimensions are 221 x 152 cm, making it a perfect alternative for a sleeping bed or duvet.