1. Soft Packs/Day Packs:
The size of these backpacks is basically medium and small, and they don't have any brackets inside or outside. They don't have a good carrying system, just like the kind of backs you do when shopping.
advantage:
a cheaper than large backpacks, and easy to use b lighter and smaller
Disadvantages:
a For long distances, the capacity is too small. b. The simpler carrying system cannot bear the heavy load. It is not comfortable to carry back.
2. External Frame Backpacks:
Outer racks once used to dominate outdoor backpacks are now rare. Outside of this kind of bag there is an H-shaped metal frame, outside the box can be hanging photography, stoves and the like. This kind of backpack has a very strong external support, which plays a good supporting role between the backpack and your shoulders and hips. More evenly distributes weight between your shoulders and hips to make your life more comfortable. The backpack and carrying system (adjustable shoulder straps, belts, chest straps, etc.) are fixed on the frame of the backpack.
advantage:
a More comfortable walking on a smooth or difficult road;
b The internal capacity of the backpack is large, and most luggage can be placed in the bag. And there are intervals and side packages, making the storage of items more convenient;
c There is more space between the body and the backpack than inside the backpack. This allows better air convection between the body and the backpack, keeping it cooler and more comfortable.
d It is cheaper than an inner stand backpack with the same capacity.
Disadvantages:
a The size of the inner support backpack is larger and heavier than the same capacity.
b When the bag is fully loaded, the backpack has a higher center of gravity and is more dangerous in poor road conditions. Especially when you need to climb or ski.
3. Internal Frame Backpacks:
The interior rack bag now basically monopolizes the market for large backpacks, and many manufacturers also have their own skills in this area. This kind of backpack will move the bracket inside the backpack, making the bracket and backpack more closely integrated. It is also better to distribute the weight between your shoulders and your hips.
advantage:
a The backpack is more comfortable and close to the body, making the center of gravity more stable;
b More flexible and easier to balance than carrying backpacks;
c The more advanced exterior design makes the activity more comfortable, especially when it passes through narrow spaces;
d Bearers are very comfortable, especially those with adjustable backpack system.
Disadvantages:
a. There are only 1- or 2 compartments in most backpacks, and there are few side pockets, making the sorting of the items more cumbersome (but now many backpacks can add outer packs);
b Since the storage space is narrow, it is more careful to put things. However, as long as careful and reasonable use, backpack life will be very long, and the older the more comfortable;
c Because the backpack is tightly integrated with the body, it is relatively hot and the air is not easily circulated. But now many manufacturers use a lot of high-tech synthetic materials on the piggyback system, making this problem better solved;
d The cost of the backpack will be higher than that of the outer stent. At present, the materials used for the backpack's brackets are often aluminum alloys, and some high-end backpacks even use titanium alloys as raw materials. Of course, their prices are also considerable. The shape of the stent is mostly long, but some higher-grade backpacks use a tubular design.