When we are preparing for a long run or multi-day adventure We choose the Salomon ADV Skin 12L Hydration Vest. ADV has a streamlined design which acts like a second skin allowing us to jump over logs and climb over chasms. Self-adjusting fabrics conform to your body shape Providing a breathable, bounce-free fit that allows you to carry all the gear you need covering mile after mile. This vest has room for a reservoir Lots of pockets and soft flasks included.