Hydrate with only the best. When you are on a hike, trail run or a marathon, the most important thing is having a BPA-free hydration bladder. With the 2.0 Liter Hydration Bladder, you will have high flow bite valves and large, easy-fill openings that now come with quick release hoses for convenient cleaning. Save time with a faster set-up in your favorite Nathan Race Vest.