Skills of backpack
For large backpacks with a volume of more than 50 liters, when placing objects, put heavy objects that are not afraid of bumping on the lower part. After putting them out, it is best to pack the backpacks alone. If there are many heavy objects, put the heavy objects evenly in the bag. And close to the side of the body, so that the overall center of gravity will not fall.
There is a skill on the shoulder of the backpack. Put the backpack at a certain height, shoulders into the shoulder strap, lean forward and stand on the legs. This is a convenient way. If there is no place to put it, put the backpack up with both hands, put it on one knee, face the strap, one hand control bag, the other hand grabs the shoulder strap and swivels quickly, so that one arm enters the shoulder strap, then the other arm enter.
After backing the bag, tighten the belt so that the crotch is subjected to the heaviest force. The chest strap should be fastened and tightened so that the backpack does not have a sense of recoil. When walking, the hands are pulled between the shoulder strap and the backpack. With the belt, the body leans forward slightly, so that when walking, the gravity is actually in the waist and the squat area, and there is no pressure on the back. In the event of an emergency, the upper limbs can be flexibly. When unprotected through rapids and steep terrain, the shoulder strap should be relaxed and the belt and chest strap should be opened so that in the event of danger, the person can be separated at the fastest speed.