Read articles on converting Dryer exhaust heat to indoor, so I bought an indoor dryer kit but needed a long air duct. After researching and needing about 30 feet, I came across this one. I like the fact the material is more durable the standard material so I am not worried about easily poking a hole in it. After 3 weeks now the duct is performing as stated. Highly recommend it thus far, cannot imagine what could go wrong with it.