Salomon’s S/Lab hydration vests are so good, the company hasn’t changed them since 2017. Some of the lightest hydration vests we’ve ever tested, they were also the first to be built for soft flasks, which conform to your body while you run—so much better than hard bottles. The ultralight, stretchy material has soft edges and bungee sternum straps to give you a snug fit without any pressure points.
The largest pack in the range boasts an eight-liter capacity—enough to hold all the gear you need for a big run like Ultra-Trail du Mont Blanc, but with a barely there feel when you don’t need it. And unlike many hydration packs, this one has pockets that can actually fit a large smartphone.KatadynWhile trail running can conjure up images of runners tackling big mountains with little gear and drinking fresh water from pristine streams along the way, most trails don’t offer such secure oases.