This top-selling hydration system features zippered main and front pockets, dual mesh overflow compartments and a front pocket organizer for stashing all your gear. Air Director back panel with Air Mesh offers cooling, ventilation. Dynamic Suspension harness stabilizes heavy loads. Splash guard protects your pack from mud and abrasion. Reflective accents increase your visibility in low light. Weather-resistant MP3 pocket keeps your tunes within easy reach. Removable sternum strap and waist belt. Includes 100 oz. OMEGA HydroTanium reservoir.