A spinner is the most comfortable luggage in the world. With two wheels placed at one side of
a garment bag,
it is much easier to carry the bag along, since you transfer half of
the weight of your luggage to the ground. A spinner doubles the number
of the wheels, so it can transfer almost all the weight of the loads.
If you are going to travel for relatively long period, a spinner will
be your ideal choice, as you can put a great deal of stuff into the
luggage without worrying about the weight and just scoot it with the
least effort.
To put it further, the most distinctive feature of a spinner bag is that the four wheels are all mounted on castors that can turn in all directions. Due to this outstanding characteristic, it deserves a specialized name.