What kind of backpack is suitable for boys?

The bag I use for my own life is converse with one shoulder, which is good for going to school, shopping, playing ball games and traveling. Converse bags are cheaper than Nike and AD, about 240-300.

The high school with two shoulders carries a Nike turtle shell, which is a lot more expensive and fits well.

However, outdoor bags are generally imitations sold by outdoor military stores, and their durability can't reach the standard at all. You must have a good backpack when traveling and camping.

It is best to go to a regular professional outdoor shop to buy.

But whether you choose a life bag or a mountaineering bag, I will give you five pertinent suggestions.

A choose the backpack size according to the time of going out and the number of loaded items.

If the travel time is short (1-3 days) and you are not going to go camping outdoors, then choose small backpack, generally 25 liters to 45 liters is enough. This kind of backpack is usually simple in structure, and there is no or little plug-in. In addition to a main bag, there are generally 3-5 attached bags, which are convenient for sorting and loading items. If you are traveling for a long time (more than 3 days) or need to bring camping equipment, you should choose a big bag, preferably 50 -70 liters. If you need to load a lot of items or have a large volume, you can choose an 80+20-liter oversized backpack or a backpack with more plug-ins

B Choose the type of backpack according to the exercise mode and the purpose of the backpack.

Both are mountaineering bags, but they have different uses. For example, rock climbing bags specially designed for rock climbing activities are generally not designed with hard supports, but are deformed to facilitate carrying. At the same time, there are many external points to facilitate hanging equipment, and some styles are specially equipped with pads for sorting equipment. Bicycle series bags designed for cycling pay more attention to riding characteristics and are suitable for cycling. It can be divided into shoulder bag, luggage rack bag, premise bag and rear hanging dual-purpose bag. A general mountaineering bag should be called a camping backpack. The design takes into account the characteristics of various sports forms and the needs of long-distance marching, and is suitable for mountaineering, exploration and woodland crossing activities. There is also a kind of backpack specially designed for long-distance travel, called multi-purpose bag or sub-bag. Its overall structure is basically similar to a mountaineering bag. It can be carried on both shoulders and layered up and down, just like a suitcase. You can carry it on one shoulder or horizontally and vertically. The big and small packages adopt conjoined structure, which is convenient to use and deeply loved by business travelers. All kinds of backpacks have their unique scope of application, and the best choice to buy a bag is special supply.

Select the size of the transport system according to the body.

The knapsack system has a specific scope of application. Although the adjustable knapsack has a large scope of application, it is not unlimited. It is very important to buy a backpack and choose the size of the backpack system. How big is it? Generally speaking, the stress point of the backpack waist should be on the lumbar fossa above the coccyx. The fulcrum of the shoulder strap should be roughly flush with the shoulder and lower than the shoulder, so as to facilitate the adjustment and stress of the stress band and make the back comfortable. Otherwise, there will be a sense of verticality, so that the stress on the waist is not in place. After adjusting the appropriate size, the backpack will naturally stick to the back and be very comfortable.

D you can't ignore the quality of materials.

Many people often pay more attention to the color and shape of their backpacks when choosing them. In fact, the key to the durability of backpacks lies in the material. From the perspective of woven belt, the price difference between ordinary woven belt and high-quality woven belt can reach 3-5 times, and the weight of woven belt selected by BIGPACK can reach more than 200 kg.

From the perspective of fabrics, there are also great differences. For the same 420D fabric, the common fabric is 280g/yard, and the high-density fabric is 4 10/0g/yard, so there is a great difference in strength and wear resistance between the two fabrics. The fabric was destructively tested on a friction machine. It is found that both fabrics are 500D, and the ordinary nylon fabric does not break until 1075 rpm, and its wear resistance is three times that of ordinary nylon. From the coating point of view, low-grade backpacks mostly use PVC coating, which will harden when it is cold, while high-grade backpacks mostly use PU coated fabrics, and the hardness has not changed significantly when it is cold. The waterproof degree of fabric coated with PU for four times can reach more than 1500MM. At present, the brand-name backpacks on the market are exquisite in materials, with good performance and quality.

E Good structure and design ensure the superior performance of the backpack.

The good performance of mountaineering bag depends on its scientific design and structure, which endows the whole aesthetic feeling, and more importantly, it enables you to enjoy excellent performance in use. We can see this more intuitively from the design structure of BIGPACK TOP series backpacks.

The principle of its backpack system structure absorbing Nepalese baskets is to adopt a double "V" design. First, the lining frame is V-shaped, with the upper width being narrow and the upper thickness being thin, and then it is basket-shaped. This structure is more convenient for force transmission. The top series backpacks adopt ETA-3 adjusting device, which is equipped with structural pad. The adjusting part has three holes, and the size of the backpack can be changed by adjusting the position of the holes. Changing the position of the structural pad can make the position of the backpack move up and down. The top series backpacks are also designed with devices to increase the volume. There is a zipper under the vertical capacity-increasing top bag, and the weight of the backpack can be increased by about 10 liter by loosening the zipper. The horizontal backpack is equipped with two longitudinal zippers on the main bag, which can make it thicker and expand its volume after release, especially suitable for loading larger items. Users can adjust the height and width as needed. With this backpack, it will increase the convenience of your travel!