I wish I'd have returned them!!! They had a snag in one of them out of the box, but I needed them badly so I thought what the heck since it was towards the top and not huge.  I intentionally get these things way bigger than the size guides suggest so as to pull them up to the top of my thighs, and while the fit actually amazing and they stayed up like a dream, they were not hardy at all.  The one snag quickly became many.... Sadly, my search for the perfect thigh high continues.  I don't expect them to be indestructable, but I'm looking for longevity as I wear these all the time... or at least I would if I could afford to get a new pair every single day!!! I've tried so many brands that I should really start a spreadsheet to keep track..... I might try to a higher-denier version of these if I can find them.