3 pounds, 15 ounces for the men's version, 3 pounds, 1 ounce for the women's version, according to the Kelty website. Not too hateful; by comparison, Osprey's popular Atmos 50 (men) and Aura 50 (women) weigh just over 4 pounds, depending on torso size. As Jim points out, there are both lighter and heavier packs with similar volume - the difference is suspension is the main factor; the suspension is also the main factor in determining how heavy a load you can carry comfortably in any given pack.