The most indispensable thing for hiking is the Backpack. In addition to making people feel refreshed and refreshed, a good outdoor backpack can carry a lot of things, free hands and keep the body balanced, making the trip safer and more comfortable. However, it is not so easy to find a suitable backpack for you in large and small backpacks of all shapes and sizes.

First, backpack fabrics - not just "face"
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, the 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. Some equipment during the climbing process, such as raincoats, warm clothing and sleeping bags, are items that do not decrease over time, and their size and weight are relatively stable.
Food and fuel are consumables that decrease with increasing activity time, and the number of such items has a significant impact on the capacity of the backpack. In general, small and medium-sized backpacks do not need this design, and no one has designed it. If you want to change the size of the bag, you can adjust it by adding side pockets or adjusting the compression side.

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.

Fourth, backpack purchase - different from person to person, according to local conditions
The adjustment range of the shoulder strap must match the length of the back to bring the center of gravity to the desired position; the hip belt must be able to be tied to the tibia. When you carry your backpack, you should be able to see your hips and legs from the back. Women who are more petite should pay special attention to this. You can only see the backpack and calf from the back when you are carrying your backpack. This is very wrong and dangerous.
The shoulder strap and backpack connection must be 5-8 cm below the shoulder, and the gap between the shoulder strap and the backpack should be small. The chest strap adjusts the width of the shoulder strap at the chest and allows the shoulder strap to be more comfortable on the shoulder and prevents the backpack from shaking. Good at using these adjustment straps and filling techniques, you can adjust the weight between the shoulders and the hips so that different muscle parts can share the weight.