CamelBak 2016 Dart Hydration Pack Nylon A favorite among runners, this lightweight and compact pack is redesigned with an improved harness and more compression Antidote reservoir features: easy open/close cap, lightweight fill port, low-profile design, and patented Big bite valve Key pack features: essentials pockets, key clip, front and back reflectivity Designed to carry ultra-light shell, phone, trail map, energy bar, wallet, keys Camelbak Got your Bak guarantee: if we build it, we'll Bak it with our lifetime guarantee Two exterior zipper pockets.