CamelBak Got Your Bak Guarantee: If they build it, they'll Bak it with their lifetime guarantee.Resilient.3L/100 oz Antidote Lumbar Reservoir with Quick Link System, 1/4 turn - easy open/close cap, lightweight fillport, center baffling and low-profile design, patented Big Bite Valve, HydroGuard technology, PureFlow tube, easy-to-clean wide-mouth opening. Extra layers, rain gear, food, head lamp, trail maps, trekking poles, media, sunglasses. Panel loading, Ultra-light materials, quick stash stretch overflow pocket, four point compression, side stretch pockets, tool attachment, sunglasses pocket..Special offer