Kensington SecureTrek 15" Lockable Anti-Theft Laptop Backpack (K98617WW) Secure Trek Lock Base lets you click in hammerhead zipper pulls to help prevent theft attempts and unauthorized access into your backpack Kensington Portable Laptop Lock (sold separately) secures bag to a fixed object Anti-puncture zipper on the device compartment resists intrusion by sharp object Lock Loop ideal for a TSA-approved travel lock when checking backpack at airport Padded device compartments hold up to 15.6 laptop and 10 tablet Workstation pocket organizes all your chargers, pens, business cards, keys and more Wheeled luggage pass-thru conveniently straps to an extended handle Padded back provides a more comfortable carry, especially when backpack is full