Product Name: Foldable Backpack Product dimensions: Folded size 21.5*18*2cm, Unfolded size 42*30.5*12cm Product weight: 105g Packing quantity: 100pcs The above data is measured manually and may contain slight errors. It is for reference only Outdoor folding bags originated from an invention by mountaineers.When climbers reach the final camp and need to make a final push, it is impossible to carry a bulky and heavy large mountaineering backpack, so this type of backpack was developed, and its requirements are as follows: OneUltra-lightweight, minimizing the bag's own weight as much as possible 2. It is foldable and can be stored compactly; when folded, it is very small in size and can be placed in a large hiking backpack, making it convenient to carry. 3. With a capacity of 25 liters, it can hold a certain amount of beverages, warm clothing, and life-saving equipment. Fourthly, the fabric is relatively strong and tear-resistant. 5. Can be carried on the shoulders, completely freeing up the hands 6. The color should be bright and eye-catching Therefore, this type is also called a "peak-packing" bag Dimensions: Approximately 30.5*42CM