Kensington Securetrek Laptop Overnight Backpack 17 Inch BlackDescriptionSpecificationsShipping SecureTrek Lock Base lets you click in hammerhead zipper pulls to deter theft attempts and unauthorized access into your backpack Kensington Portable Laptop Lock (sold separately) secures bag to a fixed object Anti puncture zipper for device compartment resists intrusion by sharp object Lock Loop ideal for a TSA approved travel lock when checking bag at airport Checkpoint friendly design can lay flat through scanner