The best hardside luggage

Three materials cover almost everything on the market, and the differences between them are real but smaller than the product pages suggest.

The useful summary: polypropylene flexes, polycarbonate resists, ABS is cheap. For a checked bag that takes genuine impacts, polycarbonate's rigidity is the right answer. For a cabin bag where weight matters more than impact resistance, polypropylene usually is. ABS is fine if you fly rarely and are not paying much.

Aluminum is the fourth option and it is a different conversation: genuinely durable, genuinely heavy, and it dents permanently rather than flexing back. It is a style choice as much as a practical one, and on a weight-limited cabin allowance it is an expensive way to carry less.

Weighted in this order: empty weight, because a hardshell's protection is paid for in weight and that weight comes out of your allowance; wheel and handle quality as reported in published testing, since those are the parts that end a bag regardless of shell; shell behavior under impact rather than a quoted material grade; and interior design, which is where hardside cases most often disappoint.

We have not dropped these cases ourselves and we do not run a testing lab. Where a durability finding comes from published hands-on testing by a named reviewer we say so. See our methodology.

• Aluminum cases. Durable and handsome, but heavy enough to consume a meaningful share of any weight-limited allowance, and dents are permanent.
• Hardside cases with external zip pockets. They compromise the shell's water resistance and the seam is a weak point - if you want pockets, buy softside.
• Glossy finishes. They scuff visibly within a few trips. Matte and textured finishes hide wear far better for no extra cost.
• Smart cases with non-removable batteries. Several airlines ban them outright.

1. Decide whether you actually need the protection. If you fly carry-on only on full-service airlines and carry nothing fragile, softside's flexibility is probably worth more. Hardside vs softside sets out the comparison properly.
2. Weigh the empty case. This is where hardside costs you, and on international carriers that weigh cabin bags it costs you every single trip.
3. Pick the shell for the job. Polycarbonate for checked, polypropylene for cabin, ABS only if you fly rarely.
4. Check the interior. Two mesh flaps and a strap is the default and it is not good enough on a multi-city trip. A compression panel is worth real money.
5. Choose a textured finish. It is the cheapest way to make the bag still look acceptable in three years.
6. Count the wheels last, but do count them. Four wheels roll better on smooth floors and cost interior volume - best spinner luggage has the four-wheel shortlist, and spinner vs roller luggage has the published figures on what they cost you.

Hardside cases have no give, which makes the size check less forgiving than it is with fabric. A shell with no give is also a shell that shows every scrape, which is why a luggage cover is a cheaper way to keep a hardside looking new than replacing it. A softside bag half an inch over will usually go into a sizer under a firm push; a polycarbonate one simply will not.

So check the overall dimension including wheels against the published limit for your airline before you buy, not after. And if you are checking the bag rather than carrying it, best checked luggage covers the 62-linear-inch rule and the weight limits that actually bite.

Two hardside cases that look identical in a photograph can be made of plastics that fail in completely different ways. Polycarbonate vs ABS luggage explains why one flexes and recovers while the other cracks, and when the cheaper shell is genuinely the right call.

A shell with no lock is a shell you will be buying a padlock for. SwissGear's Signature hardside carry-on integrates a TSA-friendly lock at the same price as competitors that leave it out, and its listings are explicit that the shell is ABS rather than polycarbonate - lighter and stiffer, but quicker to crack at a corner. The SwissGear luggage review covers that trade model by model.

The design-led brands sell a polycarbonate shell, an interior compression panel and a long repair promise as one bundle. Most buyers want one or two of those, not all three, and that is where a much cheaper hard shell becomes the right answer - Away luggage alternatives separates the bundle out and prices each part.