Zippers are typically the weakest part of any tent—they're heavy, they jam up, they're noisy (especially when your tentmate is seeking midnight relief) and they break more easily than any other part. So Big Agnes decided to make its Fishhook UL2—fly, mesh, poles and all—completely zipper-free. It uses simple hook closures with a crossover design to seal water—and bugs—outside of the rain fly, and the main door has small magnets placed along its length to create an easy-open-snap-shut seal. (Not clear? See it in action here.) Big A admits that the Fishhook isn't 100% bug-proof, but it's close. Either way, it's an innovative crack at lightweight tent design.