Product review (5 stars): Flexible, durable, works in damp environments
I used this to vent out my crawl space and remove mold, humidity, and other odors. I connected it directly to an inline duct fan I found on Amazon called "Hydrofarm Active Air 6 inch In-Line Fan 400 CFM" and then ran the other end out to a one way vent on the entrance to the crawl space. The duct has been on the damp, dirt floor of the crawl space for a year now and shows no sign of corrosion or degradation. I suspect it will last until some animal chews through it; even though it is durable, it could be punctured with a bit of force.