New never used Osprey Rev 12 backpack. The Rev 12 is a technical hydration pack perfect for day hikes or trail/endurance running. It comes with an Osprey 2.6 liter (85 ounce) water reservoir. It is a size Medium/Large with a 732 cubic inch capacity. Also has a number of additional mesh and zippered storage pockets for phone, keys, extra water bottles, snacks, etc. Asking $35 firm. Cash preferred but I can also do Venmo.