That's right—this is the legendary soft merino henley you can wear for 72+ hours straight without any sign of stink thanks to the magical properties of merino wool. We’ve put 72-Hour shirts to the test around the world—in Iceland, Mexico City, Tasmania, and more—and they’ve passed the “sniff test” every damn time. They’re UPF rated, machine washable, moisture-wicking, and odor-repellant—it's not secret why they've earned their spot as a go-to on all our one-bag travel trips.