Comparison Ninetygo Lecturer Leisure Backpack vs Xiaomi College Casual Shoulder Bag 20 L

The working volume of a backpack determines the maximum amount of cargo that can be carried in it. Note that not all manufacturers indicate this parameter in the same way: in one case it can only be the volume of the main compartment, in the other — the total capacity, taking into account all compartments and pockets. If the exact value is important for you, you should separately specify this parameter for each model of interest.

The optimal volume of a backpack is directly related to its intended purpose and features of use. For example, for an urban model designed for documents and textbooks, most often 10 liters is enough, and for trips lasting several days, about 60-70 liters, or even more, may be needed. In general, when choosing the optimal volume for a hiking backpack, it is best to turn to reference literature, or for advice from experienced “hikers”.

Note that the volume of the backpack can often be adjusted. One of the options is side ties (see "Design") to change the thickness. And in some versions, it may also be possible to change the volume due to a special folding insert made of fabric — if necessary, it can be expanded and the height of the backpack can be increased. The names of such models often contain two numbers, for example 35:45 — they indicate the volume in the folded and unfolded form, respectively. In our catalog for these options, the maximum volume is indicated, in the unfolded position.

— Anatomical. The most common type of back in today's backpacks. In accordance with the name, the shape and design of such a backrest is designed taking into account the anatomy of the human body; thanks to this, the load is optimally distributed on the user's back, which allows you to carry significant weight without much inconvenience and harm to health (of course, if the backpack is properly selected and configured). The specific features of such backpacks can be different, but most often the back has protrusions and curves, which give it the necessary properties.

— Easel. This type of backrest is a one-piece structure in the form of a frame with straps (usually metal), on which the actual soft bag for things is attached. Easel backs are less comfortable than anatomical ones, so they are relatively rare, mainly in two categories of backpacks. The first is hiking models (see "In the direction") of large capacity, from 60 liters and above; in them, the soft bag is often made removable, which allows, if necessary, to hang another load on the frame that is suitable in size and weight. The second variety is backpacks for fishermen, where the frame is actually a folding chair (see "Equipment").

— Hard back. The presence of a rigid frame in the design of the backpack. Note that this feature should not be confused with the easel back: a rigid frame usually means...one or more metal plates built into the anatomical back. The main function of such plates is to optimize the load when the backpack is unevenly filled or when carrying hard objects of an “uncomfortable” shape. Without hard inserts, the contents of the backpack could press on certain points of the back, creating discomfort, and the plates evenly distribute all the pressure on the back. At the same time, in many models it is possible to remove the frame — for example, to reduce the weight of the backpack.

— Back ventilation. This feature suggests that the back has a special design that improves air circulation between the backpack and the user's back. This, in turn, improves thermoregulation and reduces sweating. Such properties are usually achieved through the use of porous breathable materials, as well as a special relief shape of the back itself. Note that this feature will be useful not only in hot, but also in cool weather.

— Adjustment of a back on height. The ability to adjust the back of the backpack in height is found only in models equipped with a waist belt (see "Cables and belts"). The essence of this adjustment is that, thanks to a special fastening, the main straps can be moved up or down, changing the distance between these straps and the waist belt. This gives additional features for adjusting the backpack to the height and physique of a particular user.

- Sealed. This feature means that the backpack can be hermetically sealed, preventing water from getting inside (not to be confused with the included rain cover). In addition, such models are usually made of waterproof materials. Such properties can be indispensable in conditions of high humidity - for example, when rafting down a mountain river, when splashes constantly fall on things in the boat.

— Rolltop closing method. A special method of closing the backpack, allowing you to adjust its height and actual volume depending on the degree of fullness. The Rolltop backpack has the appearance of a bag with a soft upper part, which, when closed, rolls into a characteristic roll and is secured with a special fastener. This design, when closed, closes the backpack very tightly and reliably (almost hermetically), and when open it provides a wide neck, making it easier to access the contents of the bag; and there are much fewer fasteners in such backpacks than in traditional ones, which significantly simplifies use and reduces cost. At the same time, for a number of reasons, this design is considered suitable mainly for urban models; in other types of backpacks it is much less common.

— Top valve. Initially, the top flap is a piece of fabric that covers the top of a closed backpack and provides additional protection (mainly from ba...d weather). However, in modern backpacks this part is often equipped with its own pockets and actually represents an additional slot; in some models, such a slot is even removable and can be used as a separate handbag.

— Side opening. Possibility of access to the contents of the backpack through a clasp or flap on the side. This feature is especially relevant for roomy models that have a large height: you do not have to disassemble all the contents lying on top to get to the things at the bottom of the backpack.

— Bottom opening. The presence of a fastener at the bottom of the backpack, which provides access to its contents from below. The purpose of this function is similar to the side opening (see on top): to facilitate access to things located at the bottom of the backpack. It is especially useful for high-volume models, although it can also be useful for a relatively small product for urban or sports purposes. There is also a slightly different design option: the lower clasp opens not into the main slot, but into a small slot separated by a partition (the partition can be made opening, or even removable, which allows you to combine the lower slot with the main one).

— Front opening. Another additional way to access the contents of the backpack is through the clasp on its front side (opposite the back). Much the same as the side opening described on top, but the opening on the front can be made larger, making it easier to both access contents and load bulky items.

— Full opening. The possibility of full opening provides convenient access to the entire contents of the backpack. In practice, it is usually implemented using special designs of locks and zippers that run along the entire perimeter of the product. The backpack opens like a book, allowing you to quickly and easily access the items you need without removing all the contents. At the same time, this design solution makes it easier to organize the packing of things when packing them into a backpack.

— Output of the drinking system. Possibility of installing a sports drinking system in a backpack. This system consists of a soft synthetic container for water, with a capacity of up to several liters, and a tube with a valve. Accordingly, to install it, the backpack must have a slot for the container, a hole for the tube to exit, and a device for fixing it from the outside. The tube is usually secured to the backpack strap within easy reach; thanks to this, you can take a sip of water at any time without stopping or being distracted by opening/closing your backpack, which is especially useful on long hiking or cycling trips. The drinking system itself is usually not included in the package, but there are exceptions (see “Hydrator included”).

— Possibility of folding. The ability to compactly pack a backpack - for example, in a special case or tube. A useful feature if you need to travel with an empty backpack: transporting it packed in this case is often more convenient than carrying it on your shoulders without a load. The possibility of folding is found mainly in sports models (see “Purpose”).

— Change in volume. Possibility to increase/decrease the volume of the backpack. Most often, this function is provided by unfastening the zipper along the perimeter of the model itself (in fact, the volume of the main slot increases according to the principle, as is done in suitcases), there are exceptions with the location of the zipper at the bottom or front. Do not confuse changes in volume with screeds. In this case, changing the volume physically increases the size of the backpack by releasing hidden (folded or zipped) parts of the main or additional slot.

— Single-strap. Backpacks that have one strap and are designed to be worn over the shoulder. Single-strap products are found both among youth urban models and in specialized categories of backpacks, in particular tactical ones (see “In the direction”). This design not only provides the backpack with an original appearance, but also provides some very practical advantages. Thus, a single-strap backpack can be easily moved on the stomach - for example, to get something out of it, or for convenience in public transport. Also, such a product is more convenient when shooting with a rest on the shoulder than a classic backpack (of course, if you rest the weapon on a shoulder that is not covered by a strap). And for additional convenience, the design may include a side belt. On the other hand, single-strap backpacks do not distribute weight as evenly as classic backpacks and are not well suited for carrying heavy loads; therefore their volume is usually small.

The material from which the main part of the bag in the backpack is made. Note that modern manufacturers use a large number of materials, and the variety of their names and characteristics may well be confusing. So, for example, both high-quality Cordura and low cost Nylon 600D with very modest characteristics are based on nylon ; one and the same material can be classified by one manufacturer as nylon, another as polyamide, etc. Therefore, in practice, if this issue is critical for you, you can do this: find the exact name of the material used in the backpack (for example, on the manufacturer’s website) and, based on this data, find out its characteristics (up to the reviews of real users).

A few general points for choosing a backpack, taking into account materials:

• The denser varieties of the same material are usually stronger, more reliable and less permeable, but weigh more and cost more. Therefore, it is worth considering what loads you will have to carry and in what conditions - it does not always make sense to pursue maximum thickness and strength.
• Water repellency is often a double-edged sword. The fact is that such materials get wet really badly - but they dry just as badly. And therefore, paradoxically, for long hikes in wet conditions, “wetted” fabrics may turn out to be more convenient: the contents, of course, will have to be carefully packed from dampness, but the backpack i...tself will dry quickly during parking.
• UV resistance is useful in any case, but it is especially important when hiking in the mountains, where UV levels are by definition high. This is due not only to the appearance - low-quality material can even lose strength.
• When choosing a backpack for hunting (see "In direction"), it is advisable to pay attention not only to strength, water resistance, etc., but also to "noiselessness" - many varieties of synthetics make a noticeable noise during friction, which in no way contributes to the successful tracking of prey .

The material from which the bottom of the backpack is made. This parameter is in many ways similar to the material of the backpack itself, see "Material" for more details. Separately, it is worth noting that in this case, resistance to pollution and ease of cleaning can also be critical — after all, it is the bottom of the backpack that usually comes into contact with the ground.

The maximum diagonal of a laptop that can fit in the corresponding compartment of the backpack. Note that the average (standard) diagonal for modern laptops is 15.6", and most backpacks have a 15" laptop compartment. However, there are also more voluminous models that can accommodate a 17.3" or even 18.4" laptop. At the same time, compact models are also presented: there are backpacks with a compartment for a laptop 14", 13" and even smaller.

Note that the lack of a laptop compartment in itself does not prevent using a backpack to carry a laptop, however, in this case, the maximum allowable size of the device will have to be specified according to the dimensions of the backpack.