duetta
100+ Head-Fier
I've had mine ER-4s since 1998. The only times that they have become damaged is when using the foamies (which use mental sleeves that, in my experience, eventually weaken the stems) or custom earpieces (which can also damage the stems when inserted less than perfectly). They seem virtually indestructable when using the tri-flanges - short of stepping on them when they've fallen to the floor.