Capacity
The total volume of the suitcase in liters. On the one hand, the number of things that can be placed inside depends on this parameter, and on the other hand, the dimensions and weight of the suitcase itself. The optimal balance between these characteristics depends on the number of people for which the product is designed, as well as on the characteristics of the planned trips.
Conventionally, suitcases can be divided into 3 categories:
small(up to 30 L),
medium(up to 70 L),
large(up to 100 L) and
huge(over 100 L). The first option is well suited for those who are going to travel alone, and the duration of trips is not very long. Also in this category are
children's suitcases, which are distinguished by a catchy design, compact size and special appearance. Medium models are suitable for two people (or, again, for one — with a long journey). And the largest suitcases can be called "family".
Also note that some models may have adjustable dimensions and, accordingly, adjust to the volume; for such suitcases, the maximum volume is indicated in the characteristics — in a fully unfolded state.
Capacity change
The ability to increase / decrease the volume of the suitcase. It is mainly provided by unzipping the zipper around the perimeter of the suitcase. Thanks to
the function of changing the volume, the capacity can be increased, and if not needed, reduced.
Dimensions (HxWxD)
Dimensions of the suitcase in height, width and depth (it is assumed that the product stands vertically on wheels). For products with volume adjustment, the unfolded dimensions are usually indicated.
It is worth noting that with the same volume, different models may have different sizes; knowing these numbers, you can to some extent evaluate the features of the suitcase and choose the necessary
model of hand luggage on the plane. For example, a large width provides stability when transported on wheels, but is not very convenient when transported on a train — the suitcase may not “fit” under the shelf on the side; wide bags (see "Type") are also less convenient to carry by the handle on the front side, etc.
Weight
The weight of the empty suitcase. The lower this value, the easier it will be to transport luggage (with the same weight of things placed inside). On the other hand,
lightweight suitcases usually have a less dense body material. Therefore, it is worth choosing a model by weight, taking into account what balance between strength and lightness will be optimal for you.
Fabric density
The density of the fabric from which the suitcase is made (see "Case Material"). This parameter is measured in den; 1 den corresponds to such a density at which a thread 9 km long will weigh 1 gram. Accordingly, the higher the density of the fabric — the thicker the threads used for weaving it, the coarser, tougher it is and the higher the degree of protection (although the weight increases accordingly). The minimum value for modern products is 300 den; 420 den can be compared with the material of ordinary "sports and travel" bags, and in the most advanced models this figure can exceed 1000 den.
