CamelBak 2016 Marathoner Hydration Vest Nylon Our best-selling Vest, the marathoner is for the runner who wants a low-profile solution and Minimalist storage Antidote reservoir features: Quick Link system, easy open/close cap, lightweight fill port, Dryer arms, center baffling and low-profile design Features adjustable harness with cargo pockets, integrated reservoir compression, sweat-proof phone pocket, external fill Designed to carry water bottle, extra layer, nutrition, phone, Gloves, hat, keys Camelbak Got your Bak guarantee: if we build it, we'll Bak it with our lifetime guarantee Four exterior slip pockets and one zipper pocket. One interior zipper pocket.