This is lightweight and folds down to fit within its own pocket. Could be OK for light use, but there's no way to lock it.  I had an older version of this same bag from 2011. It was made of a heavier, more water-resistant fabric, and most importantly, it had a double zipper with locking loops. This allowed us to check the bag with airlines or leave it with a hotel for several days while we were on an excursion. The new version has a cheaper, one-way zipper with no way to hook a lock to the tab. Returned it.  P.S.- the 2011 model finally split open after we (too) heavily packed it then checked it on a two-leg flight from Asia to Europe. Too bad.