These are very well made, seemingly indestructible tights.  I love the fact that the bottom of the foot is solid material.  BUT for me personally, I found them to be quite itchy.  Part of what makes them so durable is what these are made of....but that's the very thing that makes them itchy for me.  If not for that, I would have kept them and I'm sure they last quite some time.  I ended up having to buy Donna Karan fishnets.  Beautiful but of course they tore on the very first wear, which is very typical in my experience with fishnets.