For your consideration I have a CamelBak Arete 18 Hydration Backpack. No bladder is included and the promo code does not appear to be valid any longer. Bag is in very nice shape with only one mark inside the pack that I have shown in the photos. The rough measurements are 18” tall and 13” wide when lying flat. Manufacturer measurements on their site show 17.72 x 9.45 x 8.66 in. Thank you!