This backpack is so well designed and constructed that it
can probably hold more than you can carry. With this being
said, you need to use good sound judgment when carrying
heavy backpacks.

It is possible to injure yourself when carrying backpacks
with heavy loads. Your physical abilities and training will
have an impact on how much you can carry safely in your
rucksack. Scientific studies have shown loads greater than
30%-40% of your body weight cause a disproportionate
rise in energy expenditure. The pain and suffering factor
also increases greatly. Environmental factors will also
affect your load carrying ability. Factors such and
temperature, terrain, altitude, and hydration status will
need to be considered. And of course, what you stuff
into your backpack DOES matter. If you want to carry the
kitchen sink be willing to pay the price. So pack smart!