Victorinox Luggage Architecture 3.0 Big Ben Mono Retrax Backpack, Black, One Size Retrax retractable wheel system allows wheels to store in wheel housing when the bag is carried on shoulders patented curved monopole handle system makes the bag feel lighter in hand and helps keep the wheels away from your heels when rolling patented, 360 degree rotating handle locks into a natural "palm-facing-the-body" position to reduce arm and wrist stress geluxe comfort grip dampens vibrations Exterior organization includes a quick-access pocket with electronics-friendly magnetic closure andd patented multi-purpose zip-away stretch side pockets ideal for a water bottle or umbrella Padded, adjustable shoulder straps tuck into zippered back panel when not in use to allow for easy rolling Lockable ykk raquet coil zippers Rear pocket coverts to a sleeve for sliding over wheeled handle systems