Product review (4 stars): Thick, tear-resistant material; need different clamps
The material for this dryer duct is much thicker and more tear-resistant that the stuff my local Ace Hardware sells.  The last time I replaced our dryer, I had to go buy a second duct from Ace since the first one ripped open with its apparent single-layer foil.  For this duct, I had to trim it to the correct length using scissors and a wire-cutter, and I actually had to punch the scissors through the material to get the cut started - impressively stronger.  There was no tearing when I backed the dryer up nearer the wall - what a relief.

The included "clamps" are not really sufficient for the job, but I had the clamps from the previous duct which worked fine.  Take a look at something like this on Amazon:

http://www.amazon.com/Whirlpool-4396008RP-Vent-Clamps-2-Pack/dp/B001AAEG68/ref=sr_1_1?ie=UTF8&qid=1403834936&sr=8-1&keywords=dryer+clamp

Overall, excellent dryer vent but subtracting one star for the flimsy clamps.