The foldable backpack originated from mountaineering backpack, which is initially invented by the mountain climber. When approaching the peak, the climbers no longer need to carry too much equipment, only need to carry a small amount of water, food, warm and life-saving items, then move forward with great efforts to the summit of the mountain with light equipment, while the large mountaineering backpack is obviously too heavy to be suitable, therefore the small and lightweight mountaineering backpack comes into being.
After that some of tour pal companions use the mountaineering backpack in the long-distance travel, the volume of the bag is small and delicate after being folded, which can placed in a large backpack, when arriving at a destination, you can put down the heavy backpack, then use the lightweight small foldable backpack, and put some belongings or valuables for light-equipped travel. Foldable backpacks generally have the following characteristics:
1, ultra-light, minimizing the weight of the backpack itself;
2, foldable for storage, folding volume is very small, can be placed in a large mountaineering backpack, easy to carry;
3, the volume ranges from 18-35 liters, can hold the common belongings;
4, the fabric has excellent water repellent and tear resistant features.