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Large backpack capacity of more than 50 liters, suitable for medium and long distance travel and more professional adventure activities. For example, when you are going to a region like Tibet for a long trip or mountaineering expedition, you should undoubtedly choose a large backpack with a volume of more than 50 liters. Some short and medium term trips also require a large backpack if you need to camp in the wilderness, because only it can hold the tent, sleeping bag and sleeping mat you need to camp. Large backpacks can be divided into hiking bags and long-distance travel backpacks according to different uses.
The climbing bag is generally thin and long, so as to pass through the narrow terrain, the package is divided into two layers, and the middle is separated by a zipper sandwich, which is very convenient when taking and placing items. The side and top of the backpack can be tied outside the tent and mat, which virtually increases the volume of the backpack. There is also an ice axe set outside the backpack, which can be used to bind ice axes and snow poles. The most worth mentioning is the back structure of these backpacks, the lightweight aluminum alloy internal frame supporting the package body, the shape of the back is designed according to the principle of ergonomics, the back bandwidth is thick, the shape is in line with the human physiological curve of the "S" type design, and there is a chest strap to prevent the strap from sliding to both sides, so that the backpackers feel very comfortable. And these backpacks all have a strong, wide and comfortable belt, the height of the strap is adjustable. Users can easily adjust the strap to their own height according to their body shape. Generally speaking, the bottom of the backpack is located above the hip, so that more than half of the weight of the backpack can be transferred to the waist, thereby greatly reducing the burden on the shoulder and reducing the shoulder damage caused by long-term load.
The package structure of long-distance travel backpack and mountaineering bag is similar, but the package body is larger, and is equipped with many side bags in order to classify and place fragments, the front face of long-distance travel backpack can usually be all opened, and it is very convenient to take and put items.
The volume of medium-sized backpacks is generally between 30 to 50 liters, these backpacks are more widely used, 2 to 4 days of field travel, travel between cities and some long-distance non-camping self-help travel, medium-sized backpacks are more suitable. You can fit your clothes and some everyday items. The style and variety of medium-sized backpacks are more diverse. Some backpacks add some side pockets, which are more conducive to separating items. The back structure of these backpacks is much the same as that of larger backpacks.