We’ve written about a lot of luggage, and experts we’ve spoken to often prefer hard-shell over soft-shell suitcases. They all pretty much agree that hard-side bags are sturdier and often more durable, as well as easier to wipe clean and slide from luggage racks and overhead bins. Worth noting: They can’t be as easily repaired — a crack will usually be fatal, says Tony Pecorella, the president and CEO of the Manhattan repair shop Modern Leather Goods. So we asked travel writers, former cabin crew, and other frequent fliers about their favorite hard-shell suitcases. If you’re avoiding checked-bag-added costs, these cases are all in carry-on size — but on some budget airlines like Frontier and JetBlue, you do now have to pay for those, too. To help you pack light, travel writers Isabelle Lieblin and Sarah Greaves-Gabbadon recommend slotting some compression packing cubes inside your hard-side case. Once you’ve packed your essentials inside, zipping them up tightly shrinks the cubes down, so you can squeeze in more than you would if you were just folding and rolling. And digital creator Ellie Robinson has a tip from the U.K., where luggage-size restrictions tend to be tighter: Sling a piece like this Etronik gym bag over your hard-side case’s handles, so you can fit more in the cabin with you (and spare your shoulders the strain). The bag will count as your personal item, slotted in under the seat in front of you at no extra cost.