trolley backpack,travel trolley bag,luggage feature:
material:polyester
size:27"*15.5"*9.5"  linear inch:52"

 Removable day pack dimensions: 16.5" x 12" x 5.75"

• It's three bags in one! Use it as a wheeled bag, as a back pack or as a day pack

• Special built in, EVA foam structure helps maintain the bag's shape while minimizing weight

• Padded backpack straps stow behind the main compartments zippered padded back panel

• Main compartment with book-style opening, interior clothing hold-down straps and large mesh pocket

• 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 straps with integrated cell phone pocket on the removable day pack

• Side-release buckle at the top of the removable day pack allows quick attachment to the main bag

• Removable day pack organizer has zippered pocket, PDS pocket, pen pockets and key fob

• Over sized, in line skate-style wheels and recessed, telescoping handle with soft-grip

• Ergonomic, Sure Grip molded-rubber grab handles with Vapel mesh padding to wick moisture

• Detachable/adjustable tow strap

• Reflective piping for added safety

• Meets airline carry on size requirements with the front day pack removed and used as second carry-on piece