No matter where you travel, one item should always be in your luggage: a great T-shirt. They make up the framework of any good outfit; pair one with shorts for a casual day or dress it up with tailored trousers or a skirt for a chic dinner. An oversized T-shirt can also double as a bathing suit cover-up , and others can be repurposed to mix and match outfits throughout one trip. The best T-shirts are made from breathable, lightweight fabrics or have cooling properties so you’ll stay comfortable in a wide variety of climates and destinations.  With so many options, our editors tested an expansive collection of shirts over months (and even years) to help determine the best wear-with-anything, last-forever, totally-worth-it T-shirts. Keep reading for the 12 best T-shirts, from brands like Buck Mason, Vuori, and Uniqlo, spanning all styles and budgets. Top Picks Why We Love It Because it's technically a performance tee, this T-shirt can be used for pretty much any travel wardrobe function.…