The Klak is an eye-catcher due to its special shape. The magnetic closure allows for the backpack to expand from 13 liters to 18 liters in a flash if you need to pack a few more things while shopping. If you get warm while cycling and you do not have a basket or space left in the Klak, the extendable front pocket allows you to clamp your sweater onto the backpack. This way you can wave your hands free and still quickly grab any item stored in the front pocket. The 15" padded laptop compartment protects your laptop from any bumps along the way and prevents scratches.