Hydration Capacity: 70 oz Lumbar (2 L). Total Capacity: 427 cu in (7 L). CamelBak Got Your Bak Guarantee: If we built it, we'll Bak it with our lifetime guarantee. Reservoir Features: Antidote Lumbar Reservoir with 1/4 turn - easy open/close cap, lightweight fillport, dryer arms, patented Big Bite Valve, HydroGuard technology, insulated PureFlow tube, easy-to-clean wide-mouth opening. BACK PANEL: Lightweight Exoskeleton. HARNESS: Ultra-light 3-D Mesh Independent Suspension with Slider SternumStrap. BELT: Side cinch 1 in (25 mm) with cargo pockets. Additional Features: Ultra-light materials, lumbar reservoir compression, bike tool organizer pocket, stretch overflow storage. Designed to carry: Multi-tool, CO2 pump & cartridges, spare tube, extra layer, energy supplements, phone, wallet, keys.