Run farther with the Nathan QuickStart 4L Hydration Pack 2.0 This hydration vest features a 1.5L Hydration Bladder to keep you hydrated while on your run. The pack is comfortable and doesn’t bounce during your outing thanks to the moisture wicking stretch woven fabric, chafe-free binding materials, breathable mesh shoulder straps and adjustable sternum straps. The pack consists of one main zippered pocket with an additional smaller pocket to keep your gear organized. On the front there is one bottle pocket for additional hydration and one zippered phone pocket. Whether you are hitting up the trails or going for a long road run, the Nathan QuickStart 4L Hydration Pack 2.0 will give you all of the hydration and storage capability you need.