It's not a bad pack as is... but the quality definitely screams "made quickly".... the duck canvas is a pretty loose weave, but the wax helped stiffen the feel.
Here's the pack:
http://Rothco Canvas Mini Alice Pack

For wax, I found good reviews on an offering from Otterwax... you really only have to smear it on like a bar of soap, but heating with a blow dryer and rubbing it in works better. I put a LOT on, and hand rubbed it. The consistency is about like butter from the refrigerator.

Otter Wax Fabric Wax