Slide top for easy refill, cleaning and drying. Heavy duty size 8 coil zippers. Front waterproof zipper that is I-Pod Ready with waterproof zipper garage, with quick release valves for drinking tube and pressurization tube for easy fill and bladder removal. Removable waist strap. Ergonomic fit shoulder strap with terracd overlay for adjustable tube configuration and power bulb configuration. Industrial load dispersement cut and padding. Integrated slider chest strap. Plug and play reservoir tube connector. PVC reinforced compression straps. Exterior side HeavyMesh pockets. External bungy storage system. Reflective tabs & zipper pulls. Internal storage compartments and organizer. Eco rig back pads with air drive ventilation. Heavy duty nylon pack handle.