Duffel bags can be used in a variety of situations. They are not as efficient as a suitcase in storing your belongings nor as efficient as a backpack to carry around. This type of luggage is usually used as a supplementary to a suitcase or backpack as they can easily be folded and stored away until you acquire too many things and you need the extra carrying space
Travel backpacks are very popular amongst young travellers who plan on visiting many different places within their trip. They usually have one large compartment with a few smaller compartments for cosmetic or electrical items. Backpacks have two straps so that you can easily carry it on your back, hence the name backpack. Contrary to a suitcase, backpacks do not have a door-like mechanism for easy access, instead they have zippers for each compartment. They are a bit more inconvenient when you need to retrieve your belongings, however, they offer the benefit of being easy to transport from place to place.
Popular with adventure travelers, these combine the convenience of wheeled luggage with the mobility of a backpack. You can transport lots of gear with a simple pull of the extendable handle. Facing heavy foot traffic or a long flight of stairs? Strap on the shoulder and waist straps for hands-free carrying convenience. These travel-friendly backpacks excel where wheeled luggage cannot: on gravel, cobblestone streets, stairs and other uneven terrain. Travel packs sport internal frames, hideaway shoulder straps and built-in security features. Women’s travel packs have suspension systems designed specifically for a woman’s frame.
Nearly all manufacturers are now rolling out new lines of bags with four wheels, which are rapidly replacing older two-wheeled versions. “the four-wheel spinner system allows the bag to be rolled easily in an upright instead of tilted position,” mori said. In addition, the wider four-wheeled bags can be turned sideways to easily pass down airplane aisles. Despite their rapid rise in popularity, “spinners” have a couple of drawbacks. Firstly, they don’t move as fast as the two-wheeled variety