High Sierra AT3 Carry-On Wheeled Backpack Duralite Tech Weave 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.