High-denier polyester. As a suitcase fabric, polyester doesn’t resist abrasion as well as nylon, but it’s a more affordable choice. To make up for the weaker material, choose a denier (thickness of fiber) with a count of at least 1,000.

Honeycomb frame. The lightweight plastic inner material that gives a bag shape and structure. It also offers shock absorption for the contents.

Kick plate/stair-climber. Located on the lower back of wheeled luggage, this plastic panel or covering provides additional protection from bumps and scuffs.

Microfiber. A soft and light synthetic fiber that doesn’t skimp on resilience. While not nearly firm enough for a suitcase, this is a good choice for duffels and carry-ons.

Pullman. Any 18- to 30-inch rectangular suitcase. (Opt for a 22-inch model, which will fit in most standard overhead compartments. You’ll almost always have to check anything larger.)

Self-repairing zipper. A zipper made of coils that, when broken, can fix themselves when the slide is moved back down over the teeth.

Spinner. A suitcase with four wheels, each of which has a 360-degree spinning range. The wheels make for easy maneuverability, so there’s less of a chance that your bag will flip over on the run.

Telescoping handle. A handle that can extend and retract for easy pulling. Make sure the extended position hits somewhere near your waist so you can grab it easily and won’t have to lean sideways as you pull it along. Additional handles on the top, side, and bottom of the bag will help you grasp it (and heave it overhead) from multiple angles.