When we're gearing up for a long trail run or a multi-day peak-to-peak adventure, we opt for the Salomon ADV Skin 12L Hydration Vest. The ADV features a streamlined design that functions as a second skin letting us hop over logs and scramble up precipices. The self-adjusting fabrics conform to your body, giving you a breathable, bounce-free fit that lets you bring all the gear you'll need when you're logging mile after mile. With room for a reservoir, plenty of pockets, and the included soft flasks, this vest keeps us hydrated from the first step to the home stretch.