Sac de voyage is an ultra-light version of a normal backpack that keeps your wallet, your sunscreen, and a bottle of water safe and available throughout your whole journey, beit a city walk or a day-long trip.

The great thing is that nobody cares even if you smuggle it into a museum or State Apartments, because it is so small and lacy. And the closure is really reliable: as long as you have it snugly closed on your back, there is no chance to get inside.