Osprey Porter Travel Backpack Bag, 46-Liter A zippered top accessory pocket is ideal for easy access to liquids and other frequently needed items. Only available on Porter 67 Large, panel load lockable zippered access to the main compartment provides easy and secure entry to the packs internal contents. One internal mesh zippered pocket and one internal fabric zippered pocket inside the main compartment provide organization of and accessibility to internal contents Foam padded sidewalls with StraightJacket compression stabilizes, protects and compresses loads A stow away padded shoulder harness with adjustable sternum strap and rescue whistle buckle allows for comfortable, supportive backpack style carry Four reinforced cord loops on the Porters front panel allow for the attachment of an Osprey Daylite pack (sold separately) to provide additional carrying capacity