The bag is rated for 34 l, which it is, but it is tiny in person. Their picture male models must be very short individuals, as, on a 5'10" frame, is is and feels tiny. The volume distribution is such that, after fitting indie a Macbook Pro 13" laptop, there is not much room left to add anything else or expand. The unusual height of the bag makes it difficult to expand volume in depth.  The straps are weirdly curved, making for an unusual posture if holding just one strap. The waist straps are the worse, large, cumbersome and limiting the bag usage further. If not strapping it on, it is pure discomfort. For the asking price, it is a major disappointment.