Fifth Season Canvas is the future (and oddly the distant past) of bike bag fabrication.  We enchew plastics as much as possible.  No plastic buckles.  No teflon.  The wax in waxed canvas consists of beeswax and paraffin, which is made from an oil production waste product called Slack Oil.  Paraffin is a food safe wax, and you have almost certainly eaten paraffin many a-time when snacking on an apple, hard candy, chocolate, veggies and cured sausages.  Contrast this with Teflon.

You can rewax canvas, but you can’t relaminate delam’d X-Pac.  And it will delam.  Just give it a bit of time.  Canvas is easy to repair with a basic needle and thread.  If you pop a rivet, you can either rerivet it yourself with a cheap rivet kit or take it to a cobbler who will charge you 12 bucks and send you on your way.  Canvas bags routinely last decades, and just need an occasional rewaxing, which you can do at home on a sunny hot day or with your oven or hair dryer.