1. Choose the right size mountaineering bag, including backpack size, shoulder size, belt size, and shoulder strap size.
2. Try to carry something weighing 10 to 15 kg on your back.
Note: Pack the bag according to the packing principle of the backpack, otherwise, the center of gravity of the bag will be wrong, which will affect the adjustment of the backpack.

3. Loosen the waist belt, shoulder strap, chest strap and center of gravity adjustment strap of the backpack.
4. Adjust the waistband: put on the backpack, adjust the position of the waistband so that it is correctly crossed on your hip bone, completely wraps the hip bone, and tightens the waistband.
It is easier to adjust the position of the belt by bending over under the load, and the buttocks can also help to push up. The belt should be completely and comfortable across your waist, and the two ends of the belt should not touch each other.
5. Tighten the shoulder strap: the sponge of the shoulder strap should go around the shoulder smoothly and obediently, there should be no gap between the shoulder strap and the body, check your shoulder strap connection belt, the adjustment buckle position of the shoulder strap connection belt should be higher than the shoulder. A little below the highest point (about above the collarbone). At the same time, a finger should be able to be inserted behind the highest point of the shoulder, otherwise, the shoulder strap will be pulled too tight.
The strap adjustment buckle should be located one palm-width away from the armpit. If the shoulder strap adjustment buckle cannot reach the correct position, you need to put the backpack down and re-adjust the size of the carrying system of the bag (the adjustment method of various mountaineering bags is different).
6. Adjust the position of the chest strap: After the shoulder strap is adjusted correctly, buckle the chest strap to make it fit your body gently. The position of the chest strap is about 5 cm below the collarbone. Note that the chest strap must not be tight so that you can breathe comfortably.