According to different travel packages, travel bags can generally be divided into three categories: large, medium and small.
The large travel bag has a volume of more than 50 liters, which is suitable for medium and long distance travel and more professional adventure activities. For example, when you are going to Tibet for a long journey or mountain climbing adventure, you should undoubtedly choose a large travel bag with a volume of more than 50 liters. If you need to camp in the wild, you also need a large travel bag for some short and medium term trips, because only it can hold the tents, sleeping bags and sleeping mats you need for camping. Large travel bags can be divided into mountaineering bags and travel bags for long distance travel according to different purposes.
The climbing bag is generally thin and long, so as to pass through the narrow terrain. The bag is divided into two layers, with a zipper interlayer in the middle, which is very convenient for picking up and placing items. Tents and mats can be tied on the side and top of the travel bag, virtually increasing 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 worth mentioning most is the back structure of these travel bags. There is a light aluminum alloy inner frame inside the bag to support the bag body. The back shape is designed according to the principle of ergonomics. The shoulder straps are wide and thick, and the shape is in line with the physiological curve of the human body. In addition, there is a chest strap to prevent the shoulder strap from sliding to both sides, which makes the travel bag wearer feel very comfortable. Moreover, all these bags have a strong, thick and comfortable belt, and the height of the strap can be adjusted. Users can easily adjust the straps to their own height according to their own figure. Generally speaking, the bottom of the travel bag is above the hips, which can transfer more than half of the weight of the travel bag to the waist, thus greatly reducing the burden on the shoulders and reducing the shoulder damage caused by long-term weight bearing.
The bag structure of the long-distance travel bag is similar to that of the mountaineering bag, except that the bag body is wider and is equipped with many side bags to facilitate the sorting and placement of odds and ends. The front of the long-distance travel bag can be opened completely, which is very convenient for taking and placing items.
The volume of medium-sized travel bags is generally 30~50 liters. These travel bags are more widely used. For 2~4 days of outdoor travel, travel between cities and some long-distance non camping self-service travel, medium-sized travel bags are most suitable. The clothes and some daily necessities can be packed. The styles and types of medium-sized travel bags are more diverse. Some travel bags have added some side pockets, which is more conducive to sub packaging items. The back structure of these travel bags is roughly the same as that of large travel bags.
The volume of small travel bags is less than 30 liters. Most of these travel bags are generally used in cities. Of course, they are also very suitable for 1 to 2 days of outings.