First, backpack fabric
At present, the materials commonly used in backpacks are "nylon" and "Cordura". Although the canvas is more wear-resistant, it is rarely used because it is easily damp, wet, not easy to dry and of high quality. Nylon cloth is light in weight, does not absorb moisture, mold, dry quickly, and has good strength; the disadvantage is that it is not wearable and is afraid of fire. Cordura is also a synthetic nylon cloth, but it performs better than nylon in terms of abrasion resistance and strength. It is also not hygroscopic, moldy and sticky and quick-drying, but slightly heavier than nylon.
Second, capacity - not just how many things can be brought
Capacity is an important factor in purchasing a backpack: the capacity is not enough. Hanging the item outside is both cumbersome and easy to lose. When the capacity is too large, the backpack is not easy to be solid when packed, and the equipment in the package will affect the balance due to the movement. Therefore, to choose the capacity of the backpack, you must first establish a personal equipment list.
Third, the carrying system - the skeleton of the backpack
The backpack carrying system does not completely solve the weight problem of the backpack. Its main function is to distribute the weight to all parts of the body to avoid weight concentration on the shoulders. It also provides a center of gravity adjustment to increase balance and safety in action. Medium and large backpacks usually consist of a backpack system centered on the back frame, and the back frame can be divided into an outer frame type and an inner frame type.
The Rack Backpack Rack Backpack secures the rucks to a rigid frame (the most common aluminum alloy) with a tensioned nylon shoulder strap and hip strap. This kind of backpack has a high center of gravity, about shoulders or shoulders. The high center of gravity design is not suitable for occasions that require a high degree of balance, but it feels more comfortable on a flat road. The backpack also facilitates the loading of items and enables the weight to be shared by the shoulders and hips. Since the outer frame backpack is carried by a shelf, the back is well ventilated.
The frame can become very inconvenient in some cases: for example, when drilling in the jungle or bamboo groves, the backpack is easily caught and caught; when climbing or skiing, it is easy to shift the center of gravity and lose balance. In short, the outer frame backpack is more suitable for long-distance travel on a flat road.
Inside rack backpack
The inner frame backpack has a slightly lower center of gravity and can be adjusted between the shoulders and the buttocks. Suitable for climbing situations where balance is required to prevent the backpack from shaking at the shoulder height.