Comparison Thule Chasm Large 90L vs Deuter Relay 80

The total volume of the bag, usually, includes all regular pockets (including external ones). A large volume allows you to put a lot of things inside, but it significantly affects the dimensions, weight and price of the product itself. Therefore, when choosing, you need to strike a balance between capacity and convenience.

It is believed that a volume of 25 – 35 liters will be quite enough for the things one person needs for a trip lasting 3 – 4 days. More detailed recommendations can be found in special sources.

At the same time, we note that even with numerous things, a large bag is not always the best option. In some cases (for example, if several people are traveling), it is more convenient to buy several products of a relatively small volume and divide the luggage between travelers.

Now on the market there are such volumes of bags: small - up to 50 liters, medium - from 51 to 75 liters, large - from 76 to 100 liters and huge, whose volumes exceed 100 liters. At the same time, you should not forget that there are also travel bags for hand luggage, as well as an even smaller version of hand luggage for low-cost airlines.

The main material used in the construction of the bag.

— Polyester. Synthetic fibre based on polyester is characterized by good strength, resistance to moisture, ultraviolet radiation and temperature extremes, and at the same time it is relatively inexpensive. However the specific degree of strength and durability depends on the grade of polyester: the more expensive the bag, the more reliable the material, usually.

— Nylon. Another type of synthetic fibre, similar in basic properties to polyester. The term "nylon" can mean different types of polymers and, accordingly, the quality of this material can also be different — from a relatively short-lived fabric that is not intended for difficult conditions, to high-end solutions like Cordura. Usually the properties of nylon are directly related to the price category of the bag.

— Polyvinyl chloride. Polymeric material, usually used not in the form of fibers (like nylon and polyester), but in the form of continuous sheets. Due to this, PVC has good moisture resistance, and is inexpensive. Strength is average, among the shortcomings it is worth noting the poor suitability for low temperatures (-10 °C and below).

— Tarpaulin. A material that combines a polypropylene fibre base and a polyethylene film coating. This combination provides good strength combined wi...th water and UV resistance. At the same time, tarpaulin has a shiny surface and is slippery to the touch, which may not appeal to lovers of classic fabrics. Most products made from this material are sports or similar road products (see "Type").

— Caprovinil. Synthetic fibre, the thread of which is a nylon (kapron) base with a PVC coating applied on top — for durability and water resistance. For a number of reasons (in particular, due to the fact that the coating tends to peel off), caprovinil is considered a low-cost-level material and is used mainly in inexpensive bags.

— Jacquard. Jacquard is not called a material, but a special type of weaving of fibers; the fibers themselves can be either natural or synthetic. Jacquard weave provides strength, reliability, low tendency to stretch and resistance to temperature extremes; other characteristics and the overall quality of such fabric, usually, are determined by the price category of the bag.

— Skin. Genuine leather has a rich and representative appearance, however, it is not cheap. Therefore, the bulk of the bags made of this material belongs to the premium class. Of the practical advantages of leather, moisture resistance, reliability and durability can be noted. Its main disadvantage, in addition to the price, is the need for specific care. In general, it is not difficult, but ignoring this care leads to rapid aging and loss of presentation, the appearance of cracks, etc.

— Artificial leather. Materials imitating the natural leather described above; also known as "leather substitutes". The common advantage of all such materials over natural leather is their low cost, the disadvantage is the tendency to abrasion and a shorter service life. Note that there are many varieties of leatherette — from the cheapest, only approximately resembling leather, to advanced, almost indistinguishable from natural material; manufacturers usually choose a specific leather substitute based on the price category of the bag.

— Polycarbonate. This tricky word usually means ordinary plastic. This material is most often found in beauty cases (see "Type"), although there are exceptions. It is often considered not very durable and reliable, but this is not entirely justified: manufacturers often use various tricks in plastic products to provide the strength necessary for practical use. At the same time, polycarbonate is inexpensive, relatively light and can be made in bright colours; and its hardness can provide additional protection for the contents. Of its unambiguous shortcomings, one can only note sensitivity to scratches.

— Aluminium. Durable, reliable, lightweight material that provides good protection for the contents of the bag while looking stylish and attractive. At the same time, aluminium is very expensive, despite the fact that in general it is not much more practical than plastic. Therefore, this option is very rare, mainly in top-level beauty cases, designed to play the role of fashion accessories.

— Cotton. Natural material, usually used in the form of a dense, rather thick fabric. Cotton is pleasant to the touch, has good strength (which can be further increased through the use of rip-stop threads), tolerates contact with moisture and temperature changes without problems, resists UV well, and looks good. At the same time, such material does not protect the contents of the bag from moisture (even special impregnations do not give a full guarantee), it is heavy, and it is quite expensive. As a result, it is rarely used, mainly in models designed for fans of classic natural materials.

— Microsuede. Synthetic material based on microfibre, imitating natural suede. The main advantage of microsuede products is a stylish and rich appearance; at the same time, synthetic suede may not be inferior to natural suede in terms of performance (although this usually depends on the price category of the bag). However this material is also expensive — so it is worth paying attention to it first of all if the appropriate style of the bag is no less important than its practical capabilities.

The number of additional external compartments provided in the bag.

Compartments differ from external pockets (see the relevant paragraph) in larger sizes — they usually occupy the entire side of the bag. Thus, rather large items can fit in the outer compartment, and it will be easier to get to them than when transported in the main compartment. One of the most popular applications for such compartments is the transportation of travel change of clothes, for example, for a train trip.

The presence of a removable shoulder strap in the design of the bag.

Carrying a bag (especially a heavy one) on the shoulder is more convenient in itself than in the hands; in addition, this method allows you to leave your hands almost free (unless you have to hold the bag). At the same time, in some situations, the belt can interfere — in this case, it is possible to unfasten it.

This feature allows you to carry the bag over your shoulders, like a regular backpack. It is worth noting that such products are generally not as comfortable as full-fledged backpacks, and are poorly suited, for example, for long hiking trips. At the same time, the ability to hang a bag on your shoulders and free your hands can sometimes be quite useful.