The large backpack with a volume of more than 50 liters, when placing items, should put the heavy objects that are not afraid of bumping on the lower part. After putting it well, the best is to stand by the knapsack alone. If the weight is more, the weight is placed evenly in the bag and close to the body side, so the overall center of gravity will not fall.
Knapsack shoulders have skills, put backpacks at a certain height, shoulders into the shoulder strap, lean forward, and stand up on both legs. This is a convenient way. If there is no high place to place, use both hands to lift the knapsack, put it on one knee, face the strap, control the bag with one hand, and the other hand to swiftly turn the shoulder strap into the shoulder strap, then the other arm enters.
After the back of the bag, to tighten the belt, make the crotch suffer the heaviest force, buckle the chest belt, tighten it, make the backpack have no backdrop feeling, take the adjustable belt between the shoulder belt and the backpack when walking, and the body is slightly forward, so that when walking, the gravity is actually in the waist, the hip, the back no pressure, the sudden event, the upper limb. It is flexible. When there is no protection through the rapids and the steep sections, the shoulder strap should be relaxed, the belt and the chest belt should be opened so that, in case of danger, the bag can be separated at the fastest speed.