I know they are only knee highs but they are SPANX!!  And they are very expensive.  But they are the "sturdiest" knee highs I've ever gotten.  The top is very substantial--thick, grippy, comfy, wide band.  The hose material is also high quality Spanx.  Unless you gouge them on something, they will last a long time.  I've worn mine 3-4 times and they still look new.