This category of luggage features bags that are expandable, lighter than their more rigid counterparts, and easier to fit into tight spaces, whether on the road or stored at home. While hard-sided luggage used to be the go-to workhorse of the traveler, the past few years have seen a steady growth in the popularity of soft-sided luggage. Whether you travel once a year on vacation or are a seasoned frequent flyer, you’re going to need luggage that won’t let you down.