Fjallraven Kanken backpacks come in different sizes. A standard Kanken backpack comes with a capacity of 16 liters and I would recommend to don't overstuff your backpack. In a standard size, Kanken backpack you are allowed to keep a few kilos of goodies, and carrying a laptop in it might not good for your back and for your laptop. You can choose a Kanken backpack especially tend for carrying a laptop. Kanken backpacks are available in three sizes so that you can choose according to your laptop size.