Bought 2 of these, one as a gift.  This will sound dumb, but this roller is like a supple card board box.  Roomy, light, expandable and sturdy.  I stay at 2 different hotels when I go to Las Vegas, so I pack, unpack a couple of times and this simple 2 sided box is just a smart and simple way to organize and pack.  The expandable feature is particularly useful.  Can never fold dirty clothes as neatly as when I'm packing before trip.  So unzip the expansion and off you go.  This has become my primary bag when I travel.  I'm getting old and this lightweight roller is just what I need now.