I bought this bag to replace an older one I had that I like to use as a travel carry on.  I like being able to have a nice roomy bag to put a magazine and some basics for a long flight.  I got this bag 2 days before my trip and transferred my usual travel stuff from my old bag to this one and headed off to the airport.  When I arrived in my destination, Germany, I went through a screening at their customs and was told this bag tested positive for explosive residue.  I was shocked, I am a frequent traveler and brought all the same stuff I usually do and I try to avoid anything that will make security screeners target me so this was a huge surprise.  They also tested my daughter but her items were all negative.  I racked my brain and all that was new was this bag and they swabbed all long the area where the handles meet the bag.  I had to undergo a search because of this but it wasn't terrible.  I was more terrified of returning to the US with this bag and undergoing a much worse search so I ended up abandoning that bag...no issues with my new bag and security screeners.  Im not sure what they used on the bag or maybe its got residue from where its manufactured but, beware, this bag may be more trouble than its worth.