The MEC Duffle Bag is simple, inexpensive, light-weight and very well made.
Compared to suitcases and rolling duffels, these bags are light-weight, and useful for flying if you need to transport a lot of “stuff” (particularly if the stuff is only accompanying you in one direction). The bags collapse, and can be stuffed away when not needed for storage or transport.
I have used the extra large model for a variety of journeys over a couple of years. There are handles on top and at the ends for easy grabbing, and a removable shoulder strap is included. The carrying handles are serviceable as backpack straps, if needed. The zippers are solid (YKK), and haven’t caused me any problems. Heavy duty nylon and webbing is used for the sides and the straps, and though not waterproof, the materials are highly resistant to tears and pulls… and washable.
In Vancouver, Mountain Equipment Co-op is legendary for high quality, inexpensive outdoor and active gear (see Turtle Light, previous Cool Tool) and they have started expanding across Canada.
[Note: If there is an American equivalent for this product let us know and we'll update the post. --OH]