According to the volume of backpacks, backpacks can generally be divided into three categories: large, medium and small.
The large backpack 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 ’re going to a region like Tibet.
When traveling or hiking, you should definitely choose a large backpack with a volume of more than 50 liters. Some short-to-medium trips also require large backpacks when camping in the wild, because only it can fit the tents, sleeping bags and sleeping mats you need for camping. Large backpacks can be divided into mountaineering bags and long-distance backpacks according to different uses.
Mountaineering bags are generally thin and elongated, so that through the narrow terrain, the bag is divided into two layers, and the middle is separated by a zipper sandwich, which is very convenient when picking up and placing items.
Tents and cushions can be tied to the sides and top of the backpack, which increases the volume of the backpack virtually. There is also an ice axe cover outside the backpack, which can be used to bundle ice axe and snow stick.
The most worth mentioning is the back structure of these backpacks. The bag has a lightweight aluminum alloy inner frame that supports the body. The shape of the back is designed according to ergonomic principles. The back is thick and the shape is in line with the physiological curve of the human body. The "S" design, as well as a chest strap that prevents the strap from sliding to the sides, makes backpackers comfortable. And these backpacks all have a strong, wide and comfortable belt, the height of the strap can be adjusted. Users can easily adjust the strap to their height according to their figure. Generally speaking, the bottom of the backpack is located above the hips, so that more than half of the weight of the backpack can be transferred to the waist, thereby greatly reducing the burden on the shoulders and reducing shoulder damage caused by long-term load.
The body structure of the long-distance travel backpack is similar to that of a mountaineering bag, except that the body is wider and equipped with many side pockets to sort the odds and ends.
The capacity of medium-sized backpacks is generally between 30 and 50 liters. These backpacks are more versatile. For 2 to 4 days of field trips, urban travel and some non-camping self-help trips, medium backpacks are more suitable Already. You can carry clothes and daily necessities. The style and variety of medium-sized backpacks are more diverse. Some backpacks have added side pockets to make it easier to pack items. These backpacks have roughly the same back structure as large backpacks.
Small backpacks have a capacity of less than 30 liters. Most of these backpacks are generally used in cities. Of course, it is also suitable for outings for 1 to 2 days.