Whether you’re examining your zipper to fix it, you’re curious, or you’re inspecting the garment it’s on, you may have noticed that many of the zippers around you have lettering stamped on them. One ...

We’ve all been there: you’re in the backcountry or on a long hike when you yank the zipper on your jacket and—bam!—it comes undone, gets stuck, or the whole thing rips off. You’re forced to ski or ...