It is three bags in one! Use it as a wheeled bag, as a backpack, or as a day pack. * Large main compartment with book-style opening and interior clothing straps. * Hidden padded backpack straps are stored behind the zippered back panel. * Removable front day pack with zippered accessory pocket, dual-side water bottle pockets, CD/MP3 player headphone port and has a back strap to allow pack to slip over the extended handle of main bag. * Padded, S-shaped shoulder straps with integrated cell phone pocket on the removable day pack.