CamelBak 2016 FlashFlo LR Hydration Waistpack Fabric Perfect for walking, hiking or running, this pack offers comfortable and stable Lumbar hydration Antidote Lumbar reservoir features: easy open/close cap, lightweight fill port, low-profile design, and patented Big bite valve Key pack features: essentials pocket, front and back reflectivity, reservoir compression, center-cinch fit system Designed to carry phone, trail map, snacks, wallet, keys, ultra-light layer Camelbak Got your Bak guarantee: if we build it, we'll Bak it with our lifetime guarantee