This secure travel bag changes shape when the traveller needs more or less capacity. It expands in size with the needs of the traveller. It can be folded to an everyday 15 litre laptop backpack for city commuting. Or, it can be expanded to 40 litre which is maximum airline cabin allowance. This backpack is secure by design: all its zips are designed safely agains the wearer's back so no one else can get in as you travel. Two-in-one secure travel backpack with a laptop holder. Ideal for the urban commuter and frequent flyer.