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Backpack How to Choose
First, the bag fabric - not just the "face"

Now commonly used material for the bag "nylon" and "Cordura" two. Although more resistant canvas, but easy to damp, wet, dry and difficult to mass heavy, so have been rarely used. The quality of light nylon, will not absorb moisture, mildew, dry fast, strength is not bad; disadvantage is not wear and afraid of fire. Cordura nylon fabric is a synthetic, but it's performance wear and strength better than nylon, the same will not absorb moisture, mildew and snow adhesion and drying, but slightly heavier than nylon.

Second, the capacity - not just how much the band

Knapsack capacity is an important factor in purchasing: capacity size is not enough, the items hanging on the outside,replica louis vuitton handbags cumbersome and easily lost; while the capacity is too large backpack is not easy when packaging the solid operations and equipment package will affect the balance because of movement. Therefore, the choice knapsack capacity of the equipment must first create a personal list.
During the climb some of the equipment such as raincoats, warm clothes and sleeping bags, etc. is not abate with time items, the size of the weight stable. However, while food and fuel are consumables, with the activity decreased with increasing time, the number of such items on the impact of very large capacity backpack.
Now some backpack with "flexible capacity" design, even in the event a few days after the backpack was still able to play solidly, but also makes this backpack can be applied to different areas of activity. In general, small and medium sized backpack does not need this design, but also designed so that no one, if you want to change the size of its capacity can be installed side pocket or adjust the compression side to bring adjustments.

Third, the suspension system - the bones backpack

Backpack carrying system and the weight of the backpack can not completely solve the problem, its main function is to assign a reasonable weight to all parts of the body to avoid the weight concentrated in the shoulder. It also provides focus to bear additional adjustments to increase the balance of operations and safety. Medium and large backpacks usually constitute a brace suspension system as the center, back frame can be divided into two outer frame and inner frame.

External frame backpack

Backpack external frame backpack is fixed in a rigid framework (the most common aluminum alloy), and a taut nylon shoulder strap and hip strap. luxury handbagThe high center of gravity backpack, around the shoulder or shoulder more. Although the design of high center of gravity that require a high degree of balance is not suitable for the occasion, but in the flat will feel more comfortable way to carry some. The backpack is also filled with easy-access items, and can make the weight from the shoulders and hips shared. External frame backpack is the carry rack, so good back ventilation.

In some cases, the framework will become very convenient: for example, drill line in the jungle, bamboo, the backpack easily be hooked stuck; climbing or skiing in the center of gravity shifted suddenly lose balance easily. In short, the external frame backpacks relatively flat for a long way to go when.

Internal frame backpack

Slightly lower center of gravity within the frame backpack, louis vuitton handbagsabout to adjust in between the shoulder and hip. Need to maintain balance for climbing occasions, to prevent a high degree of shaking in the shoulder bag.

IV bags to buy - vary according to local conditions

Shoulder belt adjustment range must match the length of the back, to make the ideal position of the center of gravity falls; hip belt must be able to tie on the hip bone. Pack and should also be seen from the back of the buttocks and legs, she is more petite women should pay special attention to this, do not pack and can only be seen from the backpack and the calf after it is very wrong and dangerous.
Buy backpack, you should first release all the adjustments together with the weight, because without the weight of backpacks can not know the feeling back up, carrying the adjustment range is appropriate, back pack containing aluminum should be checked after the arc and back curve is consistent, if they do not then check whether the aluminum bending; if they can bend the aluminum used for some time will naturally coincide with the back bent into a curve. Backpack shoulder strap and shoulder joints to be less than 5-8 cm, and the shoulder strap and backpack gap between the smaller. Chest strap you can adjust the shoulder strap width of the opening and closing the chest, shoulder strap and make more comfortable in the position of the shoulders, shake and can prevent the backpack. With good use of these adjustments and filling techniques, you can adjust the weight between the shoulders and hips, so that can be shared in different parts of the weight of the muscle.

When the bag to adjust to the most appropriate location, should check the head of the visibility? Can look up and not touch the top of backpack? Wear a helmet is still looking to the sky? Backpacks and back is comfortable, breathable contact parts? Particular attention should also shoulder strap, hip pads with the width and quality.

In addition, there are some details to note:

Is there a double bottom fabric design, this feature can greatly extend the life of backpack.
Are there tow ring, ring hanging ice ax. And multi-day walking trek, backpack design is a flexible capacity. Are there side with the design of compression, when the equipment to reduce the time it can reduce the backpack backpack tightening capacity, to prevent operation of the bags of rock moving equipment balance shift.
Are there easy to carry crampons, skis, snow shoes, trekking pole design.
Are there removable side pockets, this backpack features allow greater flexibility in capacity.
Is there chest belt pack design, it can be difficult and harsh terrain to prevent bag movement.
If the backpack is used for climbing or jungle, the smooth shape of the backpack should be chosen so that the branches or rocks entanglements.
Backpack fabric material should be strong, wear-resistant, more able to meet the needs of outdoor activities.
Zipper bag will be directly affected by force? If the force directly to the force that it limits how? If the zipper bag failure is still available.
V. backpack filled - great stress

Adversely affect the use of backpacks filled with convenience and comfort, or cause damage to the center of gravity offset and backpacks. Therefore, filling backpack by a variety of items in addition to first use classification, but also pay attention to two points: first, the focus of a solid balance between left and right; second is to facilitate access.

The following are filling principles:

1, the quality of heavy items on top and as close as possible in the back,Balenciaga bags could have been the focus of post-close to pulling back to avoid the feeling. Bulky, lightweight items can be placed on the bottom, this does not affect the center of gravity; In addition, as heavy pressure on it, so after using a backpack when it would be more dense.
2, items not on the stick hard back the site, otherwise the case will be directly within the frame backpack to the top of the back and very uncomfortable, or even fall back when hurt; such as the outer frame backpack due to hard goods and aircraft are only separated by a layer of cloth back pack, it is easy to pack cloth worn.
3, the backpack so the weight should be similar to the items placed in order to avoid the center of gravity to one side. Raincoat, drinking water and what the day should be used on top or most easily accessible place.
4, the concept of using the item type bags: will both use the same item or items in the same bag for easy access, even the little things scattered so.
5, to develop the habit of placing point: not only fast finishing backpack, and even the dark can also work out in the backpack want.
6, try to change the loading mode to minimize unnecessary backpack hanging outside, as this will affect the operational security and is not beautiful.
VI, backpack on his shoulder, down the shoulder - a trick pay attention to potential

Backpack on the shoulder with a large bag under the shoulder is to use the basic action. Shoulder on the more commonly used methods are: station lunge feet, both hands that live in the backpack shoulder strap on the front foot in the thigh, a hand first penetrated the shoulder to shoulder to bring shore shoulder bag, then another hand is also rapid penetration of the other side of the backpack shoulder strap to complete the action.
Another common way on the shoulder: the backpack onto the higher ground, as long as both hands can be a little squat penetration shoulder strap, stand up after completion of action on the shoulder. After completion of action on the shoulder Do not worry forward to deal with bags of various adjustments make appropriate adjustments to the most comfortable carrying position forward. Under the reverse shoulder bag is an action, should be gently put down the backpack down, Zhongshuai it off easily damaged backpack.
The second means not only saving on the shoulder, and can not put down the backpack as a short break, we will from time to time in the halfway break a backpack leaning against the side of the road is high. To facilitate the backpack up and down or down.