Double-zipper design allows you to pull up and down the sleeping bag anywhere inside and outside the school bag. After sports or activities, couples and friends can relax and sleep well. It can be fully opened to become a blanket for picnics or entertainment. Easy to carry and clean. Lightweight and easy to wipe by hand and machine washable. Equipped with compression bag and belt for easy storage and transport. The scroll control design makes folding easy and fast. This envelope sleeping bag is easy to roll up and store, and the side zip can also be easily removed from the inside or outside of the sleeping bag. The sleeping bag can be easily stored back in the sleeping bag and takes up little space. Lightweight and durable, comfortable and warm, easy to wash and dry. Use scenarios - After sports practice at school or gym, to relax or sleep between activities. - With friends or a partner for picnics, lounging, or dorm room downtime. - Travel, camping, or outdoor events where a compact, warm sleeping bag/blanket is convenient.