How to correctly recognize and use a backpack?

First. Types of Backpacks

--- Small Backpack (10L-30L)

1. Riding backpack. This type of backpack is suitable for cycling and trail running, and is characterized by ① having a helmet fixing point and ② having a water bag compartment.

2, business backpack. This type of backpack ① has a partition layer for laptops, and ② many partitions can store documents, business card holders and other business supplies.

3, urban leisure backpack. This is for normal city play. Cycling backpacks and business backpacks can be used as urban leisure bags, but urban leisure bags cannot be used as cycling bags and business bags because they do not have the functions of both.

4. Ice climbing and rock climbing backpacks. This type of backpack is available in 20L-30L. The features are ① crampons and ice axe fixing points ② equipment ring.

--Medium Backpack (Male 55L-70L Female 40L-65L)

1. Hiking backpack. This type of backpack is recommended to buy large or small, and it can be used for long-term or short-term activities.

 2. Snow Mountain Climbing Backpack. Depending on the climbing style, this type of backpack is suitable for Himalayan mountaineering. The so-called Himalayan mountaineering is to use all external forces to fight in a team style. Originated in China.

--Large backpack (male 80L or more, female 70L or more)

1. Long-distance hiking backpack. Because long-distance hiking takes a long time, you have to carry your own living, using, eating, and drinking, so you need a large backpack.

2, Alpine style snow mountain climbing backpack. The so-called Alpine style refers to a snow mountain climbing method that relies on personal strength and professional skills without any external force (the climbing route is explored by yourself, the protection point is set by yourself, and all the technical equipment and other things are carried by yourself). Originated in Europe.

Second. The composition of the backpack

1. Fabric

The leader in the fabric is the cordura fabric, which is produced by DuPont in the United States. Its characteristics are light weight and high wear resistance. The unit index of wear resistance is expressed in denier number (a noun in textiles), expressed with the letter D, which means the gram weight of 9000 meters of silk (this is an international standard). The larger the gram, the thicker the wire and the higher the wear resistance. For example: 420D, 600D and 1000D respectively indicate that the gram weight of 9000m silk is 420 grams, 600 grams and 1000 grams. The larger the gram, the thicker the wire and the higher the wear resistance. The corresponding backpack is more expensive. Cordura fabrics are 200D-300D higher than normal fabrics. This is why the price difference between backpacks of different fabrics is relatively large.

2. Webbing

The leader in the webbing is the webbing of Hong Kong Shengji, which is characterized by high strength, not easy to break, and smooth.

3. Buckle

The buckle is divided into a tempered buckle and a plasticized buckle. The tempered buckle is strong and can hear a crisp sound. The plasticized buckle is weak. The leader in the buckle is the French Duflex buckle, which translates to how wear-resistant it is. -40 degrees can be used normally, not easy to separate.

4, zipper,

We all know this, the Japanese YKK zipper is characterized by the fact that it will not crack when pulled, it is smooth, it can be used normally after tens of thousands of repeated use, and it can be used normally at -40 degrees.

Third. The carrying system of the backpack

1, the center of gravity adjustment belt

It is the two adjustment straps connected to the top of the shoulder strap and the left and right of the head of the backpack.

2. Balance adjustment belt

It is the adjustment belt that links the middle of the shoulder strap and the left and right sides of the bottom of the backpack.

3, shoulder strap

It is the left and right straps on the shoulders

4. Back pad

It's the pad that you put your backpack on on your back. It is divided into American and European back pads. The size of American back pads is fixed and cannot be adjusted. European back pads are sized and can be adjusted.

5. Belt

Everyone should know this, almost all outdoor backpacks have belts.

Four. The steps of the backpack

The first thing is that the backpack cannot be stressed alone when backpacking, otherwise the wear of the shoulder strap will be accelerated, and perhaps the shoulder strap will be disconnected at the most critical time. It is conceivable that once the shoulder strap is broken, the backpack is equivalent to waste, which will bring a lot of trouble. Specific steps are as follows:

1. Generally, the backpack is from right to left. Step out of your right foot and bend your knee. As long as you can hold the backpack, hold the two shoulder straps with both hands and place the backpack on your knees. 2. Insert the right hand into the shoulder strap on the right side of the backpack, hold the lower right corner of the backpack, and bend down to let the backpack press on you. 3. Put your left hand into the left shoulder strap and straighten up. 4. Finally, tie the belt and chest strap. Below I'll mention how to tie the belt and shoulder straps to keep the body comfortable.

Five. Precautions for backpacks

The main thing is how to carry the weight-bearing backpack on your body to feel comfortable and not feel too heavy. There is a slogan "one tight and two loose, determine two points".

"One tight" is to tighten the belt as much as possible, of course within your tolerance. The belt is wrapped around the outside of your crotch, which is the protruding pelvis on both sides of your waist, and you can find it by trying it with your hand. Remember, if the belt is tucked below or above the crotch, there is no force. 80% of the weight of the backpack is at the waist, saving most of your physical strength. If your pack's waistband isn't taut enough, the pack's weight is all on your shoulders and you won't be able to take it for a few minutes.

"Second loose" is to loosen the center of gravity adjustment belt and the balance adjustment belt, until you feel comfortable, pay attention to whether the shoulder straps and shoulders fit. At the same time, feel whether the force on both shoulders is balanced, and then continue to adjust the imbalance.

The "two points" are the center fixed point and the center of gravity adjustment point. The central fixing point is the left and right buckles that connect the two center of gravity adjustment straps to the backpack. Some backpacks have two buttons on the left and right. Below the medium size, use the bottom buckle, and above the medium size use the top buckle. The center of gravity adjustment point is that the center of gravity adjustment belt is above or in front of the central axis of the shoulders, so that the backpack is not easy to drag back.

Sixth. Principles of packaging

It is to put heavy things on the backpack, such as tents, etc. Keep light items under the pack, such as sleeping bags. When hanging outside, hang it lightly outside. Let the pack push you, not pull you.