Seems durable enough. I just used them on an ...
Seems durable enough.  I just used them on an 8 day trip, taking things in and out with no problems - did not zip & unzip each time, however didn't have any concerns.  They defiantly hold more then qt ziplock bags.  I'm TSA PreCheck, so did not have to take them out to show going through security.
Rating: 5 stars