Product review (5 stars): We had such GREAT results from our first one (purchased 10+ years ago) ...
This is our second purchase of the Heartland dryer vent closure.  We had such GREAT results from our first one (purchased 10+ years ago) that once it began deteriorating there was no hesitation in getting an identical one for replacement.  The original had withstood high heat and humidity as well as frequent collisions with firewood, garbage can crashes, etc.  The energy efficiency and prevention of drafts, insects, etc. is top-notch!  I would definitely recommend this product.