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70 ounces reversible reservoir. Elbow/Straight EasyFlo shut-off valve, quick-disconnect tube connection. 200 cubic inches of storage. Fully insulated pouch design with 5 mm closed-cell foam on both sides. Expando construction permits better access to zippered full-length pocket. External second pocket with mesh sides and buckle closure. 7 point external bungee cord. Hydratunes internal pocket and cord port for your MP3 player, disk or walk-man. Reflective light loop.