CamelBak Octane XCT Hydration Pack Perfect for lightweight trail running or cycling Antidote Reservoir features Quick Link System, easy open/close cap, lightweight fillport, dryer arms, center baffling and low-profile design Key Pack Features: Ultra-light materials, front and back reflectivity, safety whistle Designed to carry extra layer, trail maps, energy bars CamelBak Got Your Bak Guarantee: If we build it, we'll Bak it with our lifetime guarantee