1. Special Design Professional Design The double zipper allows you to adjust the sleeping bag up and down from anywhere inside or outside the backpack. After various activities, couples and friends can relax and enjoy a good night's sleep. It can be fully opened to serve as a blanket for picnics or leisure. 2. This envelopestyle sleeping bag is easy to roll up and store, with side zippers for convenient access from inside or outside the bag. It effortlessly fits back into the storage bag, taking up minimal space. Lightweight yet durable, it offers comfort, warmth, and is easy to wash, dry, and maintain. 3. Fully practical temperature range: 5°C to 25°C. Choose the appropriate model for use in warm or cold weather, suitable for 35 seasons. Filled with hollow fiber insulation, it ensures a cozy night's sleep even in winter. Ideal for outdoor adventures like hiking, camping, hunting, fishing, and more. 4. Easy to carry and clean—lightweight, handwipeable, and machinewashable. Comes with a compression bag and strap for effortless storage and portability. The scroll control design makes folding quick and simple.