The volume of travel bags is different, which can be generally divided into three categories: large, medium and small.
The volume of large travel bag is more than 50 liters, which is suitable for medium and long-distance travel and professional exploration activities. For example, when you want to go to areas such as Tibet for long-distance travel or Mountaineering exploration, you should undoubtedly choose a large travel bag of more than 50 liters. For some short and medium-term trips, if you need field camping, you also need a large travel bag, because only it can fit the tent, sleeping bag and sleeping mat you need for camping. Large travel bags can be divided into mountaineering bags and long-distance travel bags according to their purposes.
Mountaineering bags are generally long. Through the narrow terrain, the bag body is divided into upper and lower layers, separated by the interlayer of zipper, which is very convenient for taking and placing articles. Tents and cushions can be tied to the side and top of the travel bag, which virtually increases the volume of the travel bag. There is also an ice pick cover outside the travel bag, which can be used to bind ice picks and snow sticks. What is most noteworthy is that the back structure of these travel bags has a light aluminum alloy frame supporting the bag body. The shape of the back is designed according to the principle of ergonomics. The bandwidth of the back is very thick. The shape adopts an S-shaped design in line with the physiological curve of the human body. There is also a chest strap to prevent the back strap from sliding to both sides. Moreover, this travel bag has a strong and comfortable belt, The height of the strap can be adjusted. Users can easily adjust the strap to suit their height according to their own body. Generally speaking, the bottom of the travel bag is located above the hip, which can transfer more than half of the weight of the travel bag to the waist, so as to greatly reduce the burden on the shoulder and reduce the shoulder damage caused by long-term weight-bearing.
The structure of the long-distance travel bag is similar to that of the mountaineering bag, but the bag is wide and equipped with multiple side bags to classify and place the fragmentary items. The front face of the long-distance travel bag can usually be opened, which is very convenient for taking and placing items.
The volume of medium-sized travel bags is generally between 30 and 50 liters. These travel bags are more widely used. They are suitable for 2-4-day field travel, travel between cities, and some long-distance non camping self-help travel. Clothes and some daily necessities can be taken with you. The styles and types of medium-sized travel bags are more diversified. Some travel bags add some side bags, which is more conducive to the sub packaging of items. The back structure of this kind of travel bag is roughly the same as that of large travel bag.
The volume of small travel bags is less than 30 liters. These travel bags are generally used in cities. Of course, they are also suitable for 1-2-day outings.
