This backpack has a TSA combination lock that allows you to secure the backpack with personal code, while allowing the Transportation Security Authority (TSA) to check the luggage without damaging it, using a specific key. The anti-RFID (Radio Frequency Identification) pocket prevent the theft of electronic personal data: Ideal for all cards and the phone.The Rempart backpack adapts to the amount of things carried thanks to the expander. In addition, the front pocket can be attached and detached as needed. Easy access to USB port and loop at the back of the bag allows it to be easily slipped onto the suitcase trolley.