Take on huge races and rugged terrain with the help of the Salomon ADV Skin 12L Set Hydration Vest. Designed as a low-profile solution for hydration and gear storage during ultramarathons and long training runs, this pack's Motion Fit design was created to feel more like a piece of apparel than a pack, moving with you naturally for greater comfort and a better overall performance. Capable of holding a 1. 5L hydration bladder, this pack also comes complete with two 500ml soft flasks to keep hydration close by at all times. You can even conveniently designate one bottle for water and the other for an electrolyte drink to keep yourself moving when the going gets tough. This pack has two huge and stretchy Sensifit pockets that easily stash added layers when you're racing through constantly changing elevation. A litany of smaller pockets keep energy gels, cell phones, and other important items close by, while the rear trekking pole carry system keeps you prepared for gnarly summit pushes and winding downhills. Low on bulk and big on naturally-fitting comfort, this is a vest that you'll forget you're wearing until it comes through in the clutch.