I'm hitting this a little late, but I have a set of P1s that I took to Iraq. They survived the heat very well and had no real problems going from the 70 degree air in my room to the 130 degree heat outside. I run EZ Drone reeds in them. My only issue is that the high A and G sound really weak. All the new sets are normally hemped joints - the O-ring ones are no longer produced. They are tough - I've walked into door frames, dropped them off the bed, and had them loaded with the rest of the dufflebags into the cargo hold of an aircraft with no problems.