The volume of the suitable outdoor backpack can be selected according to the purpose:

1. 3-hour endurance sports water bag (<10L)

The main purpose of this bag is for endurance training or sports, such as marathon, cycling, mountaineering, etc., to replenish water and necessary nutrition, and to carry some necessities, such as sunglasses, sweat towels, keys, mobile phones, etc. . The main body is a 3L water bag, with some additional small storage space. Possibly have an expandable net pocket, and bring a light jacket if necessary.

2. One-day light outdoor bag (about 20L)

This kind of bag is for a day's outdoor activities, such as mountain climbing, hiking, boating, ice climbing, etc. In addition to the things mentioned above, you can also bring a jacket, fleece, more food, and more equipment Such as cooking utensils, trekking poles, ice axe hooks, etc.

3. Daily multi-purpose bag (about 30L)

This bag can cope with 1-3 days of outdoor light use, and can also be used for daily work and leisure. Some have strong expansion capabilities. It can be used for business trips of about a week. If required for daily work in the city, there is a design with a computer mezzanine, which can hold a portable or tablet computer.

4. Travel bag (about 40L)

This kind of bag is mainly for 1-2 weeks of lighter travel, and can hold a lot of clothes and items.

5. Repackaging (>50L)

This kind of bag is prepared for long-term outdoor activities. The material is strong and the carrying system is strong. It can make it easy for you to carry a lot of equipment, food, and water. It can cope with various outdoor harsh environments, is extremely strong and wear-resistant, and is difficult to damage.