Lightweight design is compact and easy to carry, making it easy to store and carry when you go outdoors.The tightening system hat adopts a rope buckle design, which can freely adjust the size of the tightness, windproof and warm.The head of the high-viscosity sleeping bag is designed with high-viscosity to prevent the zipper from being opened and cold wind is poured in.The full-open design sleeping bag can not only sleep inside, but also can be fully opened as a quilt.