Product review (4 stars): The material is a little like thick tin foil and is shinier than the duct ...
Can't complain. I needed an extra long duct and this fit the bill. The material is a little like thick tin foil and is shinier  than the duct it replaced (this duct feels thinner, although not certain if it is indeed thinner material) . Regardless, I certainly think this is a decent product as it satisfied my needs.