Right now, Nordstrom Rack is having a sale on the $495 Roberto Cavalli Travel Drop Bottom Nylon Duffel Bag, which you can currently purchase for only $90. That is 81% off the original price.

As someone who hasn’t checked a bag in more than five years of travel across the U.S. and abroad, I’ve thought a lot about what makes a good piece of carry-on luggage. A summertime European ...