The following aspects are mainly considered in the design of outdoor backpacks:

　　The carrying system, including the belt, carrying system, waist pad, and chest pad, because different activities require different carrying systems, so pay attention to the material of the carrying system when choosing.

　　Different compartments and different activities require different compartments. For example, mountaineering needs a fixed strap and safety buckle, hiking needs a kettle compartment for hanging a water bottle, daily leisure needs a key compartment for hanging an umbrella and a key case, and so on.

　　When choosing storage space, you should consider what kind of storage space you need and the number of days you travel. For example, when you are preparing things for the day when you travel on weekends, it is particularly important to have a backpack with a large enough capacity and a lot of items.

　　Moreover, many backpacks are now made of polyester material, which has good tear resistance and high-temperature resistance. But polyester material also has disadvantages, that is, it is easy to pill and fall off. The other is nylon material, which has good wear and tear resistance.

　　Capacity, the capacity of the backpack is related to the number of days we go out. Generally speaking, there is no problem with outdoor activities for about one day under normal circumstances.

　　Carrying system: Different activities require different carrying systems. For example, fixing belts and safety buckles are required for mountaineering; water bottle storage and hanging water bottle racks are required for hiking; water bottle storage for hanging water bottles is required for daily leisure; lanyards for hanging rain gear and tents are required for hiking bags, etc.

　　Capacity and size: This refers to the size of the outdoor backpack. Generally, there is no problem with a bag for a one-day trip. If it is a short-term trip or hiking, you need to choose according to the actual situation.

　　Generally speaking, the capacity of outdoor backpacks is related to the number of days we travel and the distance of activities. Generally, the capacity of outdoor backpacks is about 20L.