Zippers are a part of many pieces of gear. From our jackets to our tents and backpacks, having a functional zipper can keep us warm, dry, and all of our gear contained. What happens when that zipper ...

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 ...