Amazon.com | Travelon Anti Theft Urban Convertible Backpack 。Carry around while on vacation without the fear of having your backpack pickpocketed. New With Tags Black Style 43501 Measurements from Manufacturer 6 x 11.5 x 18.5 inches 1.75 Pounds 21 Liters 5-Point Anti-Theft Security System includes: 1. Lock-down Straps help prevent grab-and-go thieves from dashing off with your bag. Strap lock secures bag to a stationary object or chair. 2. Locking Compartments help prevent pickpockets from getting into your bag. Locking zippered pulls secure your bag contents. 3. Slash-resistant Body helps prevent slash-and-grab theft in busy areas with a slash-resistant mesh barrier in all 4 sides and bag bottom panel. 4. Slash-resistant Straps help prevent slash-and-run theft with a stainless steel wire inside the strap. 5. RFID Blocking Pockets help prevent against electronic identity theft with RFID blocking card slots and passport pockets. Generous main compartment with padded sleeves for a laptop up to 15.6”, and a tablet. Rear luggage trolley strap conveniently slides over handle, allowing you to move easier and faster. Water and dirt resistant fabric.